Alternatives to Javalin
Compare Javalin alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to Javalin in 2026. Compare features, ratings, user reviews, pricing, and more from Javalin competitors and alternatives in order to make an informed decision for your business.
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1
Bitrise
Bitrise
Bitrise is a CI/CD platform built for mobile development, helping teams speed up builds, automate testing, and deliver high-quality apps faster. It supports native languages like Swift, Objective-C, Java, and Kotlin, as well as cross-platform frameworks including React Native, Flutter, Xamarin, Cordova, and Ionic. Setup takes minutes, with customizable workflows that adapt to any project. Bitrise integrates with GitHub, GitLab, and other industry-standard tools, while its cloud infrastructure removes the need for manual processes or maintenance overhead. Pipelines provide flexible structure for CI/CD, running tasks in parallel or sequentially to optimize efficiency. With access to the latest machines, up-to-date Xcode versions, and expert customer support, Bitrise offers a complete solution for mobile teams of any size. -
2
Ktor
JetBrains
Create asynchronous client and server applications. Anything from microservices to multiplatform HTTP client apps in a simple way. Open Source, free, and fun! Ktor is built from the ground up using Kotlin and Coroutines. You get to use a concise, multiplatform language, as well as the power of asynchronous programming with an intuitive imperative flow. Ktor allows you to use only what you need, and to structure your application the way you need it. In addition, you can also extend Ktor with your own plugin very easily. Brought to you by JetBrains, creators of IntelliJ IDEA, Kotlin, and more. Ktor is not only used by our customers but also internally at JetBrains. In addition, you have top-notch tooling support! -
3
Eclipse Jetty
Eclipse Foundation
Jetty provides a web server and servlet container, additionally providing support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations. These components are open source and are freely available for commercial use and distribution. Jetty is used in a wide variety of projects and products, both in development and production. Jetty has long been loved by developers due to its long history of being easily embedded in devices, tools, frameworks, application servers, and modern cloud services. Full-featured and standards-based. Open source and commercially usable, flexible and extensible, small footprint, embeddable, asynchronous, enterprise scalable, and dual-licensed under Apache and Eclipse. Large clusters, such as Facebook Presto. Cloud computing, such as Google AppEngine. With the direction of Java and the JakartaEE project (formerly JavaEE) in 2020, the current recommended version of Jetty for use depends upon the servlet API version, desired licensing, etc. -
4
Dropwizard
Dropwizard
Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web services. Dropwizard pulls together stable, mature libraries from the Java ecosystem into a simple, lightweight package that lets you focus on getting things done. Dropwizard has out-of-the-box support for sophisticated configuration, application metrics, logging, operational tools, and much more, allowing you and your team to ship a production-quality web service in the shortest time possible. Dropwizard straddles the line between being a library and a framework. Its goal is to provide performant, reliable implementations of everything a production-ready web application needs. Because this functionality is extracted into a reusable library, your application remains lean and focused, reducing both time-to-market and maintenance burdens. Because you can’t be a web application without HTTP, Dropwizard uses the Jetty HTTP library to embed an incredibly tuned HTTP server directly into your project.Starting Price: Free -
5
MappyField 365
AppJetty
AppJetty is a leading software product company specializing in plugins, extensions, themes, and mobile applications for ecommerce and CRM platforms including Magento, Shopify, Dynamics 365, Salesforce, WordPress, Odoo, SugarCRM, SuiteCRM, and WooCommerce. With 17+ years of experience, thousands of customers worldwide, and a broad portfolio of business-focused solutions, AppJetty helps SMBs and enterprises streamline operations, improve customer engagement, optimize delivery workflows, and extend platform capabilities with scalable, feature-rich products.Starting Price: $49/month 1-5 user -
6
ORMIT™ Jasper
RENAPS
ORMIT™ Jasper is the only seamless automated migration solution to migrate Oracle Reports to Jasper Reports that can cost up to 90% less time than a manual upgrade. RENAPS ORMIT™ Jasper eliminates all migration risks associated with a manual migration. ORMIT™ Jasper improves code quality and maintainability, thus paves the way for even more savings over time. 100% Open source: no licensing, support fees, or vendor lock-ins will ever apply to your migrated reports. Jasper Reports can be used on a regular JavaEE server such as Tomcat, JBoss or Jetty and can also be used outside of pure Java application development -
7
GitBucket
GitBucket
GitBucket is a Git web platform powered by Scala. You can also deploy gitbucket war to a servlet container which supports Servlet 3.0 (like Jetty, Tomcat, JBoss, etc).Starting Price: Free -
8
Koin
Kotzilla
Koin simplifies DI and empowers developers in the Kotlin landscape. Koin helps you build any kind of Kotlin & Kotlin multiplatform application, from Android mobile to backend Ktor server applications. Koin is built for the most demanding apps and is trusted by developers worldwide. Koin is an open source dependency injection framework tailored for Kotlin developers. With its intuitive DSL and lightweight container, Koin simplifies dependency injection for any Kotlin application and SDK. Koin framework lets you build your dependency injection in a breeze, with simple API and Kotlin DSL. Koin can help you create complex Android mobile applications, so you can focus on your business, not your tools. Koin connects on top of the Kotlin ecosystem. Using the power of Kotlin, Koin provides easy dependency injection across multiple platforms. Already used by thousands of companies in the world, Koin is ready to scale in production.Starting Price: Free -
9
Jetti
Jetti
Jetti is a web app for gym, martial arts academy, and boutique studio owners that turns your own member data into a clear monthly read on the business and a prioritized list of the members to act on. Export your members and billing from any CRM (MyStudio, Kicksite, Zen Planner, PushPress, Gymdesk) and upload the CSV. Jetti auto-detects your columns and shows how you're trending across acquisition, conversion, retention, and revenue: - Dashboard with MRR and cash-basis revenue views - Trial-to-member conversion and acquisition vs. churn - A named, explained worklist of who's likely to cancel, whose pass is expiring, and which trials never converted, each with the reason, the revenue at stake, and a next step - Goal forecasting with gap-to-goal - AI-drafted retention messages and an assistant you can ask about your own numbers Runs alongside your existing gym software, not instead of it.Starting Price: $149 -
10
iDempiere
iDempiere
iDempiere. Community Powered Enterprise, also known as OSGi + ADempiere, Business Suite ERP/CRM/SCM done the community way. Focus is on the Community that includes Subject Matter Specialists, Implementors and End-Users. iDempiere is based on original Compiere/Adempiere plus a new architecture to use state-of-the-art technologies like OSGi, Buckminster, zk, Jetty -
11
Jersey
Eclipse Foundation
Developing RESTful web services that seamlessly support exposing your data in a variety of representation media types and abstracting away the low-level details of client-server communication is not an easy task without a good toolkit. In order to simplify the development of RESTful web services and their clients in Java, a standard and portable JAX-RS API has been designed. Jersey RESTful web services 3. x framework is an open-source, production-quality, framework that provides support for Jakarta RESTful web services 3.0. Jersey framework is more than the JAX-RS reference implementation. Jersey provides its own API that extends the JAX-RS toolkit with additional features. Track the JAX-RS API and provide regular releases of production quality reference implementations that ship with GlassFish. Provides APIs to extend Jersey & build a community of users and developers. Makes it easy to build RESTful Web services utilizing Java and the Java Virtual Machine.Starting Price: Free -
12
Tauri
Tauri
Tauri is a framework that enables developers to build small, fast, secure, cross-platform applications by combining existing web front-ends with Rust-powered back-ends. It supports any JavaScript framework, so you don’t need to change your stack and leverages each operating system’s native web renderer to deliver app footprints as low as 600 KB. Deep inter-process communication bridges your JavaScript UI, Rust core logic, and native Swift or Kotlin components for seamless integration with system APIs. Security is built in from the ground up, with Rust at its center and a team-driven focus on hardening and innovation. The CLI scaffolds new projects via Bash, PowerShell, npm, Yarn, pnpm, Deno, Bun, or Cargo, and includes tools for bundling, templating, and secure defaults, all accessible through a simple “create-tauri-app” command.Starting Price: Free -
13
Bottle
Bottle
Bottle is a fast, simple and lightweight WSGI micro web-framework for Python. It is distributed as a single file module and has no dependencies other than the Python Standard Library. Requests to function-call mapping with support for clean and dynamic URLs. Fast and pythonic built-in template engine and support for mako, jinja2 and cheetah templates. Convenient access to form data, file uploads, cookies, headers and other HTTP-related metadata. Built-in HTTP development server and support for paste, bjoern, gae, cherrypy or any other WSGI capable HTTP server. -
14
Codename One
Codename One
Codename One is an open-source cross-platform mobile app development framework to build native iOS, Android, Desktop & Web apps with a single Java or Kotlin codebase. It compiles Java or Kotlin into native code for iOS, Android, UWP (Universal Windows Platform), and even JavaScript (with seamless PWA and Thread support). It's a complete mobile platform featuring virtual machines, simulator, design tools (visual theme/builder/css), IDE integrations, ports to multiple OS's and much more. It provides full access to the underlying native OS code (e.g. Objective-C, C#, Dalvik/ART) through a portable abstraction which enables 100% code reuse. -
15
hug
hug
Drastically simplify API development over multiple interfaces. With hug, design and develop your API once, then expose it however your clients need to consume it. Be it locally, over HTTP, or through the command line - hug is the fastest and most modern way to create APIs on Python3. hug has been built from the ground up with performance in mind. It is built to consume resources only when necessary and is then compiled with Cython to achieve amazing performance. As a result, hug consistently benchmarks as one of the fastest Python frameworks and without question takes the crown as the fastest high-level framework for Python 3. hug makes it easy to expose multiple versions of your API. With hug you can simply specify what version or range of versions an endpoint supports and then automatically have that enforced and communicated to your API's users. -
16
Nancy
Nancy
Welcome to Nancy, our main inspiration is the Sinatra framework for Ruby and, hence, Nancy was named after the daughter of Frank Sinatra. NancyFx is the name of the umbrella project that contains all the components. Nancy is a lightweight, low-ceremony, framework for building HTTP-based services on .NET and Mono. The goal of the framework is to stay out of the way as much as possible and provide a super-duper-happy path to all interactions. This means that everything in Nancy is setup to have sensible defaults and conventions, instead of making you jump through hoops and go through configuration hell just to get up and running. With Nancy you can go from zero to website in a matter of minutes. Nancy is built to run anywhere and we mean it. Right from the start, Nancy was designed to not have any dependencies on existing frameworks. Built with the .NET framework client profile, Nancy can be used pretty much wherever you want to.Starting Price: Free -
17
Jetty
Plataforma de Transporte Digital
Collective transportation technology. We are a technology company that improves the user's experience in collective transport, providing them with the power and all the tools for a more efficient and safe mobility, in order to achieve the modernization of the sector and the cities. How do we do it? We bring all the benefits of our technology to public transit companies, corporations, tourist services or educational institutions to improve their users' experience for their commutes. Choose our technology; We have several features that you can implement in your business: Seat reservation system, payment with QR code, driver and trip rating system, customer support, fleet management tools and optimization and route planning platform. Transport services At the moment you choose Jetty, you start enjoying the city, since we take care of supervising your trips in real time while offering you the highest quality standards. We have multiple benefits that seek to empower the user. -
18
Echo
Echo
High-performance, extensible, minimalist Go web framework. Highly optimized HTTP router with zero dynamic memory allocation which smartly prioritizes routes. Build robust and scalable RESTful API, easily organized into groups. Automatically install TLS certificates from Let's Encrypt. HTTP/2 support improves speed and provides a better user experience. Many built-in middleware to use, or define your own. Middleware can be set at root, group, or route level. Data binding for HTTP request payload, including JSON, XML or form data. API to send a variety of HTTP responses, including JSON, XML, HTML, file, attachment, inline, stream, or blob. Template rendering using any template engine. Customized central HTTP error handling. Easily extendable API. Optimized HTTP router which smartly prioritizes routes. Build robust and scalable RESTful APIs. Extensible middleware framework. Define middleware at root, group, or route level Data binding for JSON, XML, and form payload.Starting Price: Free -
19
IntelliJ IDEA
JetBrains
IntelliJ IDEA is a professional-grade integrated development environment (IDE) primarily designed for Java and Kotlin development. It helps developers write code faster by automating routine tasks and providing smart coding assistance. The IDE supports the full software development lifecycle, from design and coding to testing and deployment. IntelliJ IDEA stays up to date with the latest language features, such as full support for Java 24 and Kotlin K2 mode. It offers a smooth and enjoyable workflow that helps developers stay focused and productive. The platform also emphasizes data privacy and security, complying with industry standards like SOC 2.Starting Price: $19.90 per user per month -
20
Jetpack Compose
Google
Jetpack Compose is Android’s recommended modern toolkit for building native UI. It simplifies and accelerates UI development on Android. Quickly bring your app to life with less code, powerful tools, and intuitive Kotlin APIs.Starting Price: Free -
21
FastAPI
FastAPI
FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. Fast: Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. Minimize code duplication, multiple features from each parameter declaration. -
22
Falcon
Falcon
Falcon is a blazing fast, minimalist Python web API framework for building robust app backends and microservices. The framework works great with both asyncio (ASGI) and gevent/meinheld (WSGI). The Falcon web framework encourages the REST architectural style. Resource classes implement HTTP method handlers that resolve requests and perform state transitions. Falcon complements more general Python web frameworks by providing extra reliability, flexibility, and performance wherever you need it. A number of Falcon add-ons, templates, and complementary packages are available for use in your projects. We've listed several of these on the Falcon wiki as a starting point, but you may also wish to search PyPI for additional resources. -
23
Koa
Koa
Koa is a new web framework designed by the team behind Express, which aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. By leveraging async functions, Koa allows you to ditch callbacks and greatly increase error handling. Koa does not bundle any middleware within its core, and it provides an elegant suite of methods that make writing servers fast and enjoyable. A Koa application is an object containing an array of middleware functions that are composed and executed in a stack-like manner upon request. Koa is similar to many other middleware systems that you may have encountered such as Ruby's Rack, Connect, and so on - however, a key design decision was made to provide high-level "sugar" at the otherwise low-level middleware layer. This improves interoperability, and robustness, and makes writing middleware much more enjoyable.Starting Price: Free -
24
hapi
hapi
Build powerful, scalable applications, with minimal overhead and full out-of-the-box functionality, your code, your way. Developed initially to handle Walmart’s Black Friday sales, hapi continues to be the proven choice for enterprise-grade backend needs. When you install hapi, every single line of code you get has been verified. You never have to worry about some deep dependency being poorly maintained (or handed over to someone sketchy). hapi is the only leading node framework without any external code dependencies. hapi requires the most secure settings to manage, control, and distribute code, including 2FA for all contributors. Every hapi component comes with the most secure defaults out of the box. Along with protecting server load with payload limits and request timeouts, hapi blocks error messages that could leak information or echo back exploits. The most comprehensive authorization and authentication API available in a Node framework.Starting Price: Free -
25
Slim Framework
Slim Framework
Slim is an ideal tool to create APIs that consume, repurpose, or publish data. Slim is also a great tool for rapid prototyping. Heck, you can even build full-featured web applications with user interfaces. More importantly, Slim is super fast and has very little code. You don’t always need a kitchen-sink solution like Symfony or Laravel. These are great tools, for sure. But they are often overkill. Instead, Slim provides only a minimal set of tools that do what you need and nothing else. First, you need a web server like Nginx or Apache. A Slim app contains routes that respond to specific HTTP requests. Each route invokes a callback and returns an HTTP response. To get started, you first instantiate and configure the Slim application. Next, you define your application routes. -
26
ProGuard
Guardsquare
ProGuard: Open Source Optimizer for Java and Kotlin. ProGuard is the most popular optimizer for Java bytecode. ProGuard also provides minimal protection against reverse engineering by obfuscating the names of classes, fields and methods. ProGuard reduces the download and startup time of Android applications and improves their performance on mobile devices. ProGuard obfuscates Java applications and pre-verifies the processed code for Java Micro Edition and for Java 6 and higher. ProGuard optimizes and obfuscates Java applications for cell phones, Blu-ray players, set-top boxes and other constrained devices. ProGuard fully supports Java and Kotlin applications, enabling developers to take full advantage of these languages’ features without sacrificing performance or security. ProGuard is a command-line tool with an optional graphical user interface. ProGuard is fast: It processes small Android applications and entire runtime libraries in seconds. -
27
Flask
Flask
Flask is a lightweight WSGI web application framework. It is designed to make getting started quick and easy, with the ability to scale up to complex applications. It began as a simple wrapper around Werkzeug and Jinja and has become one of the most popular Python web application frameworks. Flask offers suggestions, but doesn't enforce any dependencies or project layout. It is up to the developer to choose the tools and libraries they want to use. There are many extensions provided by the community that make adding new functionality easy.Starting Price: Free -
28
CherryPy
CherryPy
CherryPy allows developers to build web applications in much the same way they would build any other object-oriented Python program. This results in smaller source code developed in less time. CherryPy is now more than ten years old, and it has proven to be fast and reliable. It is being used in production by many sites, from the simplest to the most demanding. In order to make the most of CherryPy, you should start with the tutorials that will lead you through the most common aspects of the framework. Once done, you will probably want to browse through the basics and advanced sections that will demonstrate how to implement certain operations. Finally, you will want to carefully read the configuration and extend sections that go in-depth regarding the powerful features provided by the framework. -
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Sinatra
Sinatra
Sinatra includes a number of built-in settings that control whether certain features are enabled. Settings are application-level variables that are modified using one of the set, enable, or disable methods and are available within the request context via the settings object. Applications are free to set custom settings as well as the default, built-in settings provided by the framework. In its simplest form, the set method takes a setting name and value and creates an attribute on the application. Extensions provide helper or class methods for Sinatra applications. These methods are customarily listed and described on extensions home pages. Using an extension is usually as simple as installing a gem or library and requiring a file. -
30
restify
restify
A Node.js web service framework optimized for building semantically correct RESTful web services ready for production use at scale. restify optimizes for introspection and performance and is used in some of the largest Node.js deployments on Earth. Running at scale requires tracing problems back to their origin by separating noise from the signal. restify is built from the ground up with post-mortem debugging in mind. Staying true to the spec is one of the foremost goals of the project. You will see references to RFCs littered throughout GitHub issues and the codebase. restify is used by some of the industry's most respected companies to power some of the largest deployments of Node.js on planet Earth—the future of Node.js REST development. Setting up a server is quick and easy. Like many other Node. js-based REST frameworks, restify leverages a Sinatra-style syntax for defining routes and the function handlers that service those routes.Starting Price: Free -
31
Giotto
Giotto
It is based on the concept of Model, View and Controllers. The framework is designed to enforce a clean style that results in code that is maintainable over a long period. Other popular web frameworks are built with a mindset of launching fast. This results in code that will deploy quickly, but falls under it’s own complexity after many iterations. An example of a controller process is Apache, or gunicorn. A manifest is given to the controller process when it is started. All incoming requests to the controller process will be routed to a program contained within the manifest. A manifest is just a collection of programs. A user makes a request to the controller process. This can be a web request, or a command line invocation, or any other action that is handled by a controller process. -
32
Kotlin
Kotlin
Easy to pick up, so you can create powerful applications immediately. Compatible with the Java ecosystem. Use your favorite JVM frameworks and libraries. Share application logic between web, mobile, and desktop platforms while keeping an experience native to users. Save time and get the benefit of unlimited access to features specific to these platforms. Kotlin has great support and many contributors in its fast-growing global community. Enjoy the benefits of a rich ecosystem with a wide range of community libraries. Help is never far away — consult extensive community resources or ask the Kotlin team directly. Kotlin Multiplatform Mobile is an SDK for iOS and Android app development. It offers all the combined benefits of creating cross-platform and native apps. Maintain a single codebase for networking, data storage, analytics, and the other logic of your Android and iOS apps.Starting Price: Free -
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LoopBack
LoopBack
A highly extensible Node.js and TypeScript framework for building APIs and microservices. A brand new LoopBack core to deliver great extensibility and flexibility written in TypeScript/ES2017. Create powerful APIs easily with a new creative experience for defining REST APIs and handling API requests/responses. A new, improved programming model with dependency injection and new concepts such as components, mixins, repositories, etc. make this the most extensible version yet. The LoopBack 4 CLI is a command-line interface that can scaffold a project or extension. The CLI provides the fastest way to get started with a LoopBack 4 project that adheres to best practices. LoopBack is a highly-extensible, open-source Node.js framework that enables you to create dynamic end-to-end REST APIs with little or no coding. Access data from major relational databases, MongoDB, SOAP, and REST APIs. Incorporate model relationships and access controls for complex APIs. -
34
ASTRA Pro
Techsoft Engineering Services
ASTRA Pro has optional structural analysis and design applications for RCC framed multi storied buildings and RCC tunnel lining with steel ribs and RCC portal based on rock quality designation (RQD) and rock mass rating (RMR), RCC & PSC jetty design. ASTRA Pro gives the complete analysis and design details in step wise format and complete set of sample drawings in editable CAD format. In the demo version the default input data can not be changed and drawings are for viewing only. The Reports and drawings are complete as a set for each design modules. Detail estimation for BoQ, item rates & cost are also available for girder type bridges, box type bridges/culverts and composite bridges. ASTRA Pro is the software for Engineering Design of RCC 'T' Girder Bridges, Composite Bridges with Steel Plate/Box Girder and RCC Deck Slab with single and Multi-Span in Straight or Curve layout, PSC 'I' Girder Bridges, PSC Box Girder Bridges, Continuous PSC Box Girder Bridges, Steel Truss Bridges, etc. -
35
Jetty
Jetty
Game-changing financial products built to solve your needs. We’ve created a unique, integrated product suite that reduces bad debt across the renting lifecycle. The deposit replacement increases leasing velocity and reduces bad debt. The flexible rent payment program guarantees on-time rent payments and improves your resident retention. Modern renters insurance gives you the liability coverage you need, with a product your renters will love. With Jetty, you can perfectly tailor the coverage you need for your renters and assets. We have teams ready to support you every step of the way, from training and implementation to claims and ongoing program optimization. Our products are integrated with all the major property management systems. We don’t just fit into your workflows, we help improve them. We’ve shaped and refined our products by working closely with the most forward-thinking names in real estate. -
36
Express
OpenJS Foundation
Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. With a myriad of HTTP utility methods and middleware at your disposal, creating a robust API is quick and easy. Express provides a thin layer of fundamental web application features, without obscuring Node.js features that you know and love. Express has no notion of a database. This concept is left up to third-party Node modules, allowing you to interface with nearly any database. In Express, 404 responses are not the result of an error, so the error-handler middleware will not capture them. This behavior is because a 404 response simply indicates the absence of additional work to do; in other words, Express has executed all middleware functions and routes, and found that none of them responded.Starting Price: Free -
37
Deeplearning4j
Deeplearning4j
DL4J takes advantage of the latest distributed computing frameworks including Apache Spark and Hadoop to accelerate training. On multi-GPUs, it is equal to Caffe in performance. The libraries are completely open-source, Apache 2.0, and maintained by the developer community and Konduit team. Deeplearning4j is written in Java and is compatible with any JVM language, such as Scala, Clojure, or Kotlin. The underlying computations are written in C, C++, and Cuda. Keras will serve as the Python API. Eclipse Deeplearning4j is the first commercial-grade, open-source, distributed deep-learning library written for Java and Scala. Integrated with Hadoop and Apache Spark, DL4J brings AI to business environments for use on distributed GPUs and CPUs. There are a lot of parameters to adjust when you're training a deep-learning network. We've done our best to explain them, so that Deeplearning4j can serve as a DIY tool for Java, Scala, Clojure, and Kotlin programmers. -
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Ruby Grape
Ruby Grape
An opinionated framework for creating REST-like APIs in Ruby. -
39
Vue.js
Vue.js
Builds on top of standard HTML, CSS and JavaScript with intuitive API and world-class documentation. Truly reactive, compiler-optimized rendering system that rarely requires manual optimization. A rich, incrementally adoptable ecosystem that scales between a library and a full-featured framework. Vue is a JavaScript framework for building user interfaces. It builds on top of standard HTML, CSS and JavaScript, and provides a declarative and component-based programming model that helps you efficiently develop user interfaces, be it simple or complex. Vue extends standard HTML with a template syntax that allows us to declaratively describe HTML output based on JavaScript state. Vue automatically tracks JavaScript state changes and efficiently updates the DOM when changes happen. Vue is a framework and ecosystem that covers most of the common features needed in frontend development. -
40
Koog
JetBrains
Koog is a Kotlin‑based framework for building and running AI agents entirely in idiomatic Kotlin, supporting both single‑run agents that process individual inputs and complex workflow agents with custom strategies and configurations. It features pure Kotlin implementation, seamless Model Control Protocol (MCP) integration for enhanced model management, vector embeddings for semantic search, and a flexible system for creating and extending tools that access external systems and APIs. Ready‑to‑use components address common AI engineering challenges, while intelligent history compression optimizes token usage and preserves context. A powerful streaming API enables real‑time response processing and parallel tool calls. Persistent memory allows agents to retain knowledge across sessions and between agents, and comprehensive tracing facilities provide detailed debugging and monitoring.Starting Price: Free -
41
SecureCodingHub
Secure Coding Hub
SecureCodingHub is an interactive secure coding training platform for AppSec teams and engineering organizations. It offers Code Review Challenges — a two-phase find-and-fix flow across 185+ vulnerability types — and Guided Attack Scenarios with 67 step-by-step walkthroughs simulating full attack chains. Challenges are written in production-realistic code across 15 languages and frameworks including JavaScript, TypeScript, Python, Java, C#, Go, React, Vue, Angular, Swift, and Kotlin. Coverage spans OWASP Web, API, Mobile, and Client-Side Top 10. Compliance evidence builds automatically, mapped to PCI DSS 4.0.1, ISO 27001:2022, and EU CRA. Enterprise features include SAML 2.0/OIDC SSO, SCIM 2.0, SCORM 1.2/2004 LMS integration, multi-tenant hierarchy, assignment workflows, and an immutable audit log for QSA, SOC 2, and ISO audits.Starting Price: Contact us -
42
JetBrains Aqua
JetBrains
Aqua is the first IDE created specifically for test automation. It‘s an all-in-one workspace that supports Selenium, Cypress, and Playwright. Aqua is a polyglot IDE that understands Java, Python, JavaScript, TypeScript, Kotlin, and SQL. Get straight to testing without having to install and configure lots of plugins. Aqua boasts a unique feature set containing everything a test automation engineer needs on a daily basis. Aqua’s Web Inspector works like a built-in browser and allows you to capture any page element without switching to another tool. There is also the HTTP client for API testing and integration with databases, Docker, and version control. Aqua minimizes the hassle for even the most challenging tasks. The combination of intelligent code analysis, powerful search and refactoring capabilities, and overall ease of use enables you to boost your quality engineering productivity.Starting Price: $249 per year -
43
Bootify
Bootify.io
Rapid application development for Spring Boot developers. Select your preferences (Maven/Gradle, Java/Kotlin, etc.), create your custom database model and download your runnable Spring Boot application. REST API with basic CRUD operations included and Best Practices applied. Get advanced feature in the professional plan, like integration tests with testcontainers or pagination support.Starting Price: $0 -
44
TotalCross
TotalCross
Less than 5MB of footprint, ensuring high performance even when running in low-end devices. Basic knowledge of Java or Kotlin lets you build performing Apps for Android, Linux Arm, Windows, and iOS. Code once and run on every platform. Responsive User Interfaces provide the same behavior and usability. Tecdet develops systems for traffic control and inspection for the Brazilian government. They decided to rebuild their system for the Linux Arm architecture compatible with Toradex modules and chose TotalCross to develop their GUI. -
45
Refraction
Refraction
Refraction is a code-generation tool for developers. It uses AI to generate code for you. You can use it to generate unit tests, documentation, refactor code, and more. Generate code using AI in 34 languages — Assembly, C#, C++, CoffeeScript, CSS, Dart, Elixir, Erlang, Go, GraphQL, Groovy, Haskell, HTML, Java, JavaScript, Kotlin, LaTeX, Less, Lua, MatLab, Objective-C, OCaml, Perl, PHP, Python, R Lang, Ruby, Rust, Sass / SCSS, Scala, Shell, SQL, Swift, and TypeScript. Join thousands of developers around the world using Refraction to generate documentation, create unit tests, refactor code, and more using AI. Use the power of AI to automate the tedious parts of software development like testing, documentation, and refactoring, so you can focus on what matters. Refactor, optimize, fix and style-check your code. Generate unit tests for your code with various test frameworks. Explain the purpose of your code to make it easier to understand.Starting Price: $8 per month -
46
RKTracer
RKVALIDATE
RKTracer is a code-coverage and test-analysis tool that enables teams to assess the quality and completeness of their testing across unit, integration, functional, and system-level testing, without altering a single line of application code or build workflow. It supports instrumentation across host machines, simulators, emulators, embedded devices, and servers, and covers a broad array of programming languages, including C, C++, CUDA, C#, Java, Kotlin, JavaScript/TypeScript, Golang, Python, and Swift. It provides detailed coverage metrics such as function, statement, branch/decision, condition, MC/DC, and multi-condition coverage, and even supports delta-coverage reports to show which newly added or modified portions of code are already covered. Integration is seamless; simply prefix your build or test command with “rktracer”, run your tests, then generate HTML or XML reports (for CI/CD systems or dashboards like SonarQube). -
47
Webix
Webix
JavaScript UI library and framework for speeding up web development. JS Framework for cross-platform web Apps development 102 UI widgets and feature-rich CSS / HTML5 JavaScript controls. Save at least 3000+ development hours by using ready-made widgets and UI controls. Develop Web UI 30% faster. We have accumulated the best design ideas. We have meticulously considered UX of each Webix component for five conceptual designs. Our support service specialists know everything about our library and can help you solve any problem. We also have an official support forum where you can discuss issues with our developers. By using Webix JS framework you receive an elegant and lightweight code based on object-oriented programming concepts. Associate your project with jQuery JavaScript library, MVC frameworks AngularJS, React, Vue.js, Backbone.js, third party UI extensions.Starting Price: $848 -
48
Grails
Grails
A powerful Groovy-based web application framework for the JVM built on top of Spring Boot. Convention-over-configuration, sensible defaults, opinionated APIs, and the Groovy language combine to make the Grails® framework easy to learn for Java developers. The Grails framework is built on top of Spring Boot and leverages Spring Boot's time-saving features, such as Spring-powered dependency injection. The Grails framework seamlessly and transparently integrates and interoperates with Java, the JVM, and existing Java EE containers. Apache Groovy is a language for the Java platform designed to enhance developers' productivity. It is an optionally-typed and dynamic language but with static-typing and static compilation capabilities. The Grails framework seamlessly integrates with GORM, a data access toolkit that provides a rich set of APIs for accessing relational and non-relational data. GORM also includes implementations for Hibernate (SQL), MongoDB, Cassandra, and Neo4j.Starting Price: Free -
49
Bitdive
Bitdive
BitDive is a zero-code quality and test automation platform for Java, Kotlin, Spring Boot and other JVM-based applications that captures real executions and converts them into reusable, deterministic test scenarios you can replay in CI, staging or on a developer machine without writing or maintaining test code. BitDive runs as a lightweight library dependency and records full context from real traffic including HTTP/gRPC requests and responses, method calls, SQL queries with parameters and results, service interactions and timings, enabling deep method-level observability, distributed tracing, performance profiling and semantic drift detection. Its capture-replay-verify loop lets teams automatically generate regression suites and JUnit tests from actual executions, reproduce and debug production bugs locally with full execution chains, eliminate fragile mocks and flaky tests, and validate behavior changes before deployment. BitDive also visualizes service maps and heatmaps.Starting Price: Free -
50
Vert.x
Vert.x
Handle more requests with fewer resources compared to traditional stacks and frameworks based on blocking I/O. Vert.x is a great fit for all kinds of execution environments, including constrained environments like virtual machines and containers. People told you asynchronous programming is too hard for you? We strive to make programming with Vert.x an approachable experience, without sacrifying correctness and performance. Don’t waste resources, increase deployment density and save money. You pick the model that works best for the task at hand, callbacks, promises, futures, reactive extensions, and (Kotlin) coroutines. Vert.x is a toolkit, not a framework, so it is naturally very composable and embeddable. We have no strong opinion on what your application structure should be like. Select the modules and clients you need and compose them as you craft your application.Starting Price: Free
