Page 42 | Best Free Application Development Software of 2026

WhaleDeck

Simplify your Docker workflow with WhaleDeck, the ultimate app for monitoring and controlling your Docker containers. With a user-friendly interface and powerful features, WhaleDeck is the only tool you need to manage your Docker environment. Monitor your containers with ease, thanks to WhaleDeck's real-time visualization of CPU, memory, drive and network usage. Keep track of your container logs and quickly identify issues with the built-in log viewer. And with support for multiple servers at once, you can easily manage all of your Docker environments from one place. Take control of your containers with the ability to run actions like start, stop, and pause on a single container or at multiple containers at once. And with the Split View feature, you can work more productively by seeing multiple parts of your Docker environment side by side. Whether you're a developer, DevOps engineer, or just someone who needs to manage Docker containers, WhaleDeck makes it simple.

Starting Price: $1.99

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Promptmetheus

Compose, test, optimize, and deploy reliable prompts for the leading language models and AI platforms to supercharge your apps and workflows. Promptmetheus is an Integrated Development Environment (IDE) for LLM prompts, designed to help you automate workflows and augment products and services with the mighty capabilities of GPT and other cutting-edge AI models. With the advent of the transformer architecture, cutting-edge Language Models have reached parity with human capability in certain narrow cognitive tasks. But, to viably leverage their power, we have to ask the right questions. Promptmetheus provides a complete prompt engineering toolkit and adds composability, traceability, and analytics to the prompt design process to assist you in discovering those questions.

Starting Price: $29 per month

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Gogs

The Gogs project aims to build a simple, stable, and extensible self-hosted Git service that can be set up in the most painless way. With Go, this can be done with an independent binary distribution across all platforms that Go supports. Simply run the binary for your platform. Or ship Gogs with Docker or Vagrant, or get it packaged. Gogs runs anywhere Go can compile for Windows, Mac, Linux, ARM, etc. Gogs has low minimal requirements and can run on an inexpensive Raspberry Pi. Some users even run Gogs instances on their NAS devices. Gogs is 100% open source and free of charge. All source code is available under the MIT License on GitHub. User dashboard, user profile, and activity timeline. Access repositories via SSH, HTTP, and HTTPS protocols. User, organization, and repository management. Repository and organization webhooks, including Slack, Discord, and Dingtalk. Repository Git hooks, deploy keys, and Git LFS. Repository issues, pull requests, wiki, and protected branches.

Starting Price: Free

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Five

Five is a low-code development environment that helps software developers build and deploy bespoke business software. Rapidly build release-ready software using Five’s prebuilt features, such as a hosted SQL database, authentication, or access control. Connect to multiple data sources and query (almost) any data source, such as external databases (PostgreSQL, MySQL, SQL Server & more) or REST API endpoints. Add full code almost anywhere through its native support for SQL, JavaScript, TypeScript, and HTML, Five never limits developers by what’s available out of the box. Five offers a free download that comes with no time limits. You can download it on your desktop and start building for free. Once you have developed a production-worthy application, you can deploy it to the cloud by subscribing to one of our hosting plans for as low as US$29.99/month. Five takes care of all the complicated deployment processes, allowing you to focus on what matters the most - your applications

Starting Price: $29.99/month

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Dolt

DoltHub

Version control features from Git on your SQL database tables. Commit, branch, merge, clone, pull, and push your data and schema. Use a familiar interface to query data and explore history as of time, commit, branch, or tag. Dolt solves this problem with a special type of replica you add to an existing MySQL deployment. No migration is required. You get an audit log of every cell, time travel, and branch for development on a replica.

Starting Price: $50 per month

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Overlay

The first platform to generate clean code from its design components. Overlay is a plugin to convert Figma or Sketch components into React/Vue.js/HTML clean code components. Overlay instantly creates dev-friendly web components from designer tools. This documentation assists designers and developers in accelerating their web design integration process. We’ve developed Overlay so that designers can be autonomous in building pixel-perfect components without knowing the modern JavaScript framework. Moreover, We think front-end developers must spend their time on high-value tasks (performance, SEO, business logic)and not on translating UX work to code. Overlay Playgrounds are design files with a lot of component examples, ready for Overlay, and all the explanations to make them by yourself and become an expert. It's still possible to use Overlay with other setups, this adds a little work overhead after getting components code. In the future, we will add more and more setups.

Starting Price: $15 per month

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rnbw

HTML and CSS are what you see in your browser. they're not just code, they're design tools. when you design with them, you're not on a flat canvas, you're crafting within the web's natural structure. think of the web as boxes inside boxes. this lets you freely move and compose content. with rnbw, you're designing inside the web's framework. working within these limits, you're embracing the essence of web design. rnbw is simple enough for anyone, flexible enough for anything, and open enough to use anyhow. it differs from traditional software by focusing on atomic concepts. while features are great "one-size-fits-all" solutions, atomic concepts multiply their meaning when combined. by breaking down complex ideas into atomic concepts, rnbw allows users to build their solutions in the best way possible that works for them, not others. we believe this design principle is the key to more powerful software.

Starting Price: Free

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Locofy

Frontend development accelerated with AI. Turn designs into frontend code for web & mobile. Build full apps, screens, components & design systems. Ship products 10x faster with your existing design tools, libraries, tech stack & CI/CD workflows. Figma & Adobe XD to React, React Native, HTML/CSS, Gatsby, Next.js, Vue, and more coming soon. Keep using the tools you already use. We provide a Figma & Adobe XD plugin to tag your interactive elements and handle styling, layout, and responsiveness. As a bonus, we provide pre-built components from Material UI, Bootstrap, Ant Design, Chakra UI as well as your Storybook. Locofy converts your designs into production-ready code for React, React Native, HTML-CSS, Next.js, Gatsby, Vue, and more on the way in your preferred framework. Make reusable components and props with LocoAI. Export your code in your preferred settings (CSS Modules, Tailwind, CSS, Typescript, JavaScript, Expo).

Starting Price: Free

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Gefyra

Blueshoe

Building and pushing containers to test them in Kubernetes is repetitive and time-consuming. Writing and debugging code that depends on services in Kubernetes is daunting. Especially if they are not reachable during development. Gefyra is an Open Source project that runs local code in any Kubernetes cluster without the build and push cycle. It overlays containers in the cluster making code changes immediately available. Gefyra enables you to: - Run containers and talk to internal services on an external Kubernetes cluster - Operate feature-branches in a production-like Kubernetes environment with all adjacent services - Overlay Kubernetes cluster-internal services with you local container. - Leverage development clusters for multiple developers at the same time. - Write code in the IDE you already love - Leverage all the neat development features, such as debugger, code-hot-reloading, overriding - Run high-level integration tests against all dependent services

Starting Price: free

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Hashnode

Create and grow your developer blog, newsletter, or team engineering blog effortlessly with Hashnode. Level up your writing using powerful AI features. Blogging platform optimized for software developers and technical writers. Super-fast and SEO-optimized blogs built for developers and tech enthusiasts. Hashnode blogs are fast, up-to-date with SEO techniques, and score above 90 on all Lighthouse parameters. They're simple, elegant, and user-friendly. Own your traffic. Blog for free on a custom domain! Don't blog on rented URLs. Map your custom domain to your Hashnode blog for free and own your traffic. True content ownership. Automatic GitHub backup and publishing. Publish articles from your GitHub repository to your Hashnode blog and backup your Hashnode articles to GitHub like a pro. Create and scale developer documentation and API references that are as dynamic as your code. Built for teams that need full control, customization, and Stripe-level quality.

Starting Price: $199 per month

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Relume

Relume is an advanced AI-powered website design platform that helps designers and developers move from concept to structure in minutes, not hours. With just a simple text prompt, it generates a complete sitemap and wireframes, accelerating the early stages of web production. The platform includes a deep library of 1,000+ responsive UI components that can be exported directly to tools like Figma, Webflow, or React. Designers maintain full creative control, refining layouts and swapping components while the AI handles the structural groundwork. For teams juggling tight deadlines, Relume provides both speed and consistency across projects. Whether you're building landing pages, brand sites, or prototypes, Relume helps you start strong and iterate smarter.

Starting Price: $18 per month

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Firecamp

Navigate effortlessly through a clean and clutter-free interface, allowing you to focus on what truly matters—efficiently testing and collaborating on APIs. With a user-friendly interface and a range of powerful features, Firecamp streamlines the API development workflow and enhances collaboration among team members. Set values in variables to reuse in the whole platform dynamically. Publish beautiful API documentation for your team and community. Run API Collection Tests in the terminal or set in CI/CD pipeline. Test and debug your auth endpoints with a range of supported auths.

Starting Price: Free

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Confident AI

Confident AI offers an open-source package called DeepEval that enables engineers to evaluate or "unit test" their LLM applications' outputs. Confident AI is our commercial offering and it allows you to log and share evaluation results within your org, centralize your datasets used for evaluation, debug unsatisfactory evaluation results, and run evaluations in production throughout the lifetime of your LLM application. We offer 10+ default metrics for engineers to plug and use.

Starting Price: $39/month

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WebForge IDE

Parallax Dynamics

A complete, powerful web development environment for iOS. WebForge includes everything you need to develop, run, and debug your web projects on your iPad or iPhone. No cloud needed. Includes: - Powerful code editor with syntax highlighting. - Inspect Browser built-in, providing extensive desktop-class browser dev tools. - Complete Git support - clone, branch, commit, pull, and push. - Run entire PHP projects on-device. Support for includes and a wide variety of extensions. Run on your device in the built-in browser. - Clone projects locally to your device or open code stored on iCloud. - Includes customizable and extensive code checking with in-editor notices to keep your code bug-free. - No cloud needed, everything runs on your device. Easily build fantastic web projects on your iPad and iPhone!

Starting Price: Free

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WebThings

Monitor and control all your smart home devices via a unified web interface. The purpose of the Web of Things is to create a decentralized Internet of Things (IoT) by giving connected devices URLs on the web to make them linkable and discoverable and defining a standard data model and protocol to make them interoperable. WebThings is an open source implementation of the Web of Things, including the WebThings gateway, WebThings framework, and WebThings cloud. The WebThings project was incubated at Mozilla for four years, before being spun out as an independent open source project. WebThings Gateway is a software distribution for smart home gateways which enables users to directly monitor and control their smart home over the web, without a middleman. It provides a web-based user interface to monitor and control smart home devices, a rules engine to automate them and an add-ons system to extend the gateway with support for a wide range of existing smart home devices.

Starting Price: Free

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Qubitro

Qubitro enables collaboration on device data and modern application development. There are no ingestion or extraction limits and they don't have an effect on usage. Qubitro supports popular data sources out-of-the-box and provides tools for real-time collaboration on your projects combined with scalable infrastructure. To build with Qubitro, you need to create a project that groups data sources and other platform features. Amplify your startup's solution through events and marketing initiatives.

Starting Price: $2 per device per month

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Sciter

Sciter brings a stack of web technologies to desktop UI development. Web designers, and developers, can reuse their experience and expertise in creating modern-looking desktop applications. Various GUI frameworks offer different UI declaration and styling languages, such as QML and XAML (Microsoft WPF). On the contrary, Sciter allows the use of time-proven, robust, and flexible HTML and CSS for GUI definition and GPU-accelerated rendering. In almost 10 years, the Sciter UI engine has become the secret weapon of success for some of the most prominent antivirus products on the market, Norton Antivirus and Internet Security, Comodo Internet Security, ESET Antivirus, BitDefender Antivirus, and others. The use of HTML/CSS has allowed their UI to stay in touch with modern GUI trends throughout all these years and will continue to well into the future. Sciter Engine is a single, compact DLL of 5+ Mb in size.

Starting Price: $310 one-time payment

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GUIslice

GUIslice is a very lightweight platform-independent GUI designed for embedded displays, from an 8-bit Arduino with 2KB RAM to the Raspberry Pi. The library supports creation of multiple pages of buttons, text, images, checkboxes, sliders and other graphics primitives. New UI / widget types can be created easily. The core GUIslice library is written in pure C. GUIslice is intended to be used with Raspberry Pi and all Arduino adaptations (ATmega, STM32duino, ESP8266 / NodeMCU, ESP32, Adafruit Feather M0, nRF52, etc.). In addition to RPI, GUIslice works in other LINUX-based platforms including BeagleBone Black and Virtual Machines (VM). The LINUX operation supports framebuffer-based displays without X-windows / X11. Touchscreen controls are supported (both resistive and capacitive), but it is also possible to run on non-touch displays. Keyboard / GPIO / button navigation of the GUI is also available.

Starting Price: Free

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LVGL

LVGL is the most popular free and open source embedded graphics library to create beautiful UIs for any MCU, MPU, and display type. Use SquareLine Studio, our drag-and-drop UI editor, to simplify the development. 30+ built-in widgets, 100+ style properties, web-inspired layout managers, and a typography system supporting many languages. LVGL is fully open source and has no external dependencies which makes its porting incredibly simple. It works with any modern MCU or MPU and can be used with any (RT)OS or bare metal setup to drive ePaper, monochrome, OLED, or TFT displays, and even monitors. Besides, it's free even for commercial projects. SquareLine Studio is an easy-to-use drag-and-drop UI editor tool for LVGL where even designers can create fully functional UIs. Just like LVGL, SquareLine Studio is also fully vendor-agnostic. We have a great network of people and companies who can help you design and develop your UIs, implement drivers, or the whole application.

Starting Price: Free

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SquareLine Studio

Next-generation UI editor for individuals and professionals to design and develop beautiful UIs for your embedded devices quickly and easily. Exports platform-independent C or MicroPython code for LVGL which can be compiled for any vendor's device. Just click the play button to try out the UI instantly without rebuilding it in a pixel-perfect preview. Create custom components from the built-in widgets using styles, animations, and events. SquareLine Studio exports plain C or MicroPython code so you can use it on any platform. IoT, smart home and home automation, wearable instruments, automotive, medical devices, and many more. Even for 4K displays in kiosk devices or multi-platform desktop applications. Unlike in other prototyping tools, in SquareLine Studio you can build the UI from fully functional components. SquareLine Studio offers flexible licenses for all use cases, including personal use, startups, and large companies as well.

Starting Price: $16 per month

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GEMstudio Pro

Amulet Technologies

Try a free download of GEMstudio Pro, the easiest, fastest, and most flexible graphical user interface software design tool in the embedded space. Our GUI software enables anyone to easily design, customize, test, and implement a high-end user interface into every kind of embedded product. GEMstudio Pro is a true WYSIWYG GUI programming environment that offers different levels of complexity. Our software targets the novice user, which means you don’t need a programming background to use it. With GEMstudio Pro, anyone, with any background, can create smartphone-like GUIs. This allows for your business to create many design iterations, as well as closer collaboration between marketing and engineering teams. Our software makes it easy for engineers are able to build a bespoke GUI without needing any artistic background. Above all, all of this happens in days, instead of months. As a result, your product ends up with the best user experience possible.

Starting Price: Free

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SuprSend

SuprSend has built-in integration with all channels and major providers. You can start with one channel, and add more channels within minutes. Add or remove providers without any lock-in, and route notifications between them easily. Empower the product team to design and manage templates on all channels at a central place. SuprSend provides powerful visual editors for all channels, decoupling templates from code. Send notifications on all channels with a single trigger. Maximize delivery, reduce latency and make notifications meaningful by configuring intelligent fallbacks, retries, and smart routing between channels. Send instant alerts to a large list of users and keep your users up to speed with key actions. Send OTPs, verification mails and activity updates instantly with high throughput and low latency.

Starting Price: $99 per month

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µGUI

µGUI is a free and open-source graphic library for embedded systems. It is platform-independent and can be easily ported to almost any microcontroller system. As long as the display is capable of showing graphics, µGUI is not restricted to a certain display technology. Therefore, display technologies such as LCD, TFT, E-Paper, LED or OLED are supported. μGUI is platform-independent, so there is no need to use a certain embedded system. In order to use μGUI, only two requirements are necessary.

Starting Price: Free

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Alphadoc

Your open API spec is at the core of Alphadoc, create tutorials and intuitive sequence diagrams on top of it. Always in sync with your OAS spec through versioning. We will help you document your SDKs, long code snippets, and entire demo applications. Easily create code walkthroughs, combining API references, variables and more. Interactive docs let developers try out API calls with real data, and from your documentation and guides. With auto-updating endpoints on your pages, you can effortlessly describe API calls without the need for manual copying and pasting. We provide you with the building blocks to create intuitive documentation. You can also embed endpoints, diagrams and code walkthroughs in websites, blogs, or wherever you want.

Starting Price: €150 per month

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Tiny API

We manage billing, subscribers, distribution, and support so you can focus on building the best APIs. Developers choose Tiny API to monetize, manage, and magnify their APIs with ease. Unleash the full potential of your APIs with Tiny API. Offer different subscription plans and manage them effortlessly through our platform. List your API with a single click and make it available to a global audience. Let users test your API directly from the demo page with interactive input fields and real-time results. Your API users can reach our support team anytime through live chat and get instant assistance. Handle any amount of traffic with our scalable infrastructure, designed to grow with your success. Connect with fellow developers building on Tiny API, share ideas, and form partnerships. Discover how much you could make by listing or building your APIs with us. Your API should be well-documented, reliable, and offer value to our community.

Starting Price: $16.49 per month

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Pop

Pop Technologies

Blazing-fast screen sharing, multiplayer control, crystal-clear voice and high-quality video. Perfect for pair programming. Pop’s multiplayer screen sharing — where everyone controls the screen together with their own mouse and keyboard — makes it effortless to collaborate on code. Whiteboarding has never been easier. Doodle together at anytime, even from a smartphone or tablet. Simple. Fast. And you’ll never need to worry about dried-out markers. Inviting people is as easy as sending a link, and everyone can join even before registering. If you have a laptop or a smartphone, you’re in.

Starting Price: Free

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Cosine Genie

Cosine

Whether it’s high-level or nuanced, Cosine can understand and provide superhuman level answers. We're not just an LLM wrapper – we combine multiple heuristics including static analysis, semantic search and others. Simply ask Cosine how to add a new feature or modify existing code and we’ll generate a step by step guide. Cosine indexes and understands your codebase on multiple levels. From a graph relationship between files and functions to a deep semantic understanding of the code, Cosine can answer any question you have about your codebase. Genie is the best AI software engineer in the world by far - achieving a 30% eval score on the industry standard benchmark SWE-Bench. Genie is able to solve bugs, build features, refactor code, and everything in between either fully autonomously or paired with the user, like working with a colleague, not just a copilot.

Starting Price: $20/month

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Novu

A digest engine that aggregates multiple events in to a single precise notification. Debug deliverability and analyze sending patterns across multiple channels. Manage content for all channels and in multiple languages without the need to redeploy your code. Send transactional notifications based on user's timezone and working hours. Build a real-time notification center using our embeddable components or connect your custom UI with our notification feed API. Open source is in the heart of Novu. We keep all the source code and work publicly available. Join our community-driven project with over 3,000+ developers from around the world who contribute code and help build the modern notification infrastructure.

Starting Price: $25 per month

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nandbox

nandbox is a no-code mobile app builder that serves to fit any type and size of business, community, and government deployment. Indeed, we help meet the fast-changing market needs. Build native mobile apps for iOS and Android with no coding background, simply drag and drop your features and create your app with no development costs. Additionally, apps produced on nandbox app builder are native which is a software application that is designed to work on a specific platform, either Android or iOS. Whereas the application can access certain features on the mobile like the camera, calendar, and contacts. In fact, our competitors use a web-based app where the entire infrastructure of the app is hosted on the web, and the mobile access the app through a web browser. Foster a sense of belonging with engaging channels, a rich news feed, and GPS-located events. Connect people through instant text & media messages, clear video & audio calling, and groups that can hold up to 50,000 members

Starting Price: $59 per month

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Bleesk

We develop ready-to-use custom-branded proximity apps and submit them to the App Store and Google Play in just 14 days. Attract new customers and improve in-store experience. Deliver personalized and context-relevant offers. Reward customers with coupons for purchases or visits. We deliver a complete white-label platform with a native iOS and Android mobile app and proven proximity technology so you can offer it to your customers. We build and maintain the apps, app content management system, and platform for you. We take care of technology, development, app submission, updates & new feature releases. From essential tools that help you acquire customers, to game-changing features that engage and retain customers, we’ve built the definitive platform for proximity marketing. We are the only complete plug-and-play proximity platform on the market that provides App, CMS, SDK & API. Dynamically change your monthly charge, and pay only for the features you use.

Starting Price: Free

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Best Free Application Development Software - Page 42

Compare the Top Free Application Development Software as of May 2026 - Page 42

WhaleDeck

Promptmetheus

Gogs

Five

Dolt

Overlay

rnbw

Locofy

Gefyra

Hashnode

Relume

Firecamp

Confident AI

WebForge IDE

WebThings

Qubitro

Sciter

GUIslice

LVGL

SquareLine Studio

GEMstudio Pro

SuprSend

µGUI

Alphadoc

Tiny API

Pop

Cosine Genie

Novu

nandbox

Bleesk

Best Free Application Development Software - Page 42

Compare the Top Free Application Development Software as of May 2026 - Page 42

WhaleDeck

Promptmetheus

Gogs

Five

Dolt

Overlay

rnbw

Locofy

Gefyra

Hashnode

Relume

Firecamp

Confident AI

WebForge IDE

WebThings

Qubitro

Sciter

GUIslice

LVGL

SquareLine Studio

GEMstudio Pro

SuprSend

µGUI

Alphadoc

Tiny API

Pop

Cosine Genie

Novu

nandbox

Bleesk

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