Showing 531 open source projects for "build apps"

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    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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  • Go From AI Idea to AI App Fast Icon
    Go From AI Idea to AI App Fast

    One platform to build, fine-tune, and deploy ML models. No MLOps team required.

    Access Gemini 3 and 200+ models. Build chatbots, agents, or custom models with built-in monitoring and scaling.
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  • 1
    MCP Apps

    MCP Apps

    Official repo for spec & SDK of MCP Apps protocol

    MCP Apps is an extension ecosystem for a context-driven AI application protocol that lets developers build modular, interoperable apps that work together in shared model environments. The project defines standards, interfaces, and reusable components so different application modules can communicate context, state, and user intent reliably while preserving privacy and user control.
    Downloads: 3 This Week
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  • 2
    Streamlit

    Streamlit

    The fastest way to build data apps in Python

    A faster way to build and share data apps. Streamlit turns data scripts into shareable web apps in minutes. All in pure Python. No front‑end experience is required. Build an app in a few lines of code with our magically simple API. Then see it automatically update as you iteratively save the source file. Adding a widget is the same as declaring a variable.
    Downloads: 58 This Week
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  • 3
    .NET Runtime

    .NET Runtime

    Cross-platform runtime for cloud, mobile, desktop, and IoT apps

    .NET is a free, cross-platform, open source developer platform for building many different types of applications. With .NET, you can use multiple languages, editors, and libraries to build for web, mobile, desktop, games, and IoT. You can write .NET apps in C#, F#, or Visual Basic. C# is a simple, modern, object-oriented, and type-safe programming language. F# is a cross-platform, open-source, functional programming language for .NET. It also includes object-oriented and imperative programming. Visual Basic is an approachable language with a simple syntax for building type-safe, object-oriented apps. ...
    Downloads: 31 This Week
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  • 4
    Appsmith

    Appsmith

    Low code project to build admin panels, internal tools, and dashboards

    Low code project to build admin panels, internal tools, and dashboards. Integrates with 15+ databases and any API. Appsmith is an open-source platform to build, deploy, and maintain internal apps. You can build anything from simple CRUD apps, admin panels, dashboards to custom business apps and complicated multi-step workflows. Build your UI with our drag and drop UI builder.
    Downloads: 10 This Week
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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  • 5
    lightning AI

    lightning AI

    The most intuitive, flexible, way for researchers to build models

    Build in days not months with the most intuitive, flexible framework for building models and Lightning Apps (ie: ML workflow templates) which "glue" together your favorite ML lifecycle tools. Build models and build/publish end-to-end ML workflows that "glue" your favorite tools together. Models are “easy”, the “glue” work is hard. Lightning Apps are community-built templates that stitch together your favorite ML lifecycle tools into cohesive ML workflows that can run on your laptop or any cluster. ...
    Downloads: 3 This Week
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  • 6
    Electron

    Electron

    Build cross-platform desktop apps with JavaScript, HTML, and CSS

    Electron is an open-source framework that uses Node.js runtime and the Chromium web browser thereby allowing you to build apps with JavaScript, HTML, and CSS. It is compatible with Mac, Windows and Linux and comes with convenient features such as automatic updates, app crash reporting, debugging and profiling and more. It takes care of the hard parts so you can focus on the core of your app. Initially developed for the Atom editor, Electron is now the framework of choice for dozens of popular desktop apps including Microsoft's Visual Studio Code.
    Downloads: 30 This Week
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  • 7
    Quasar Framework

    Quasar Framework

    Build high-performance VueJS user interfaces in record time

    Effortlessly build high-performance & high-quality Vue.js 3 user interfaces in record time. Combine the power of Quasar UI with Quasar CLI. One source code for all platforms simultaneously with all the latest and greatest best practices out of the box. Focus only on your app's features and forget about the boilerplate around it. Build high-performance VueJS user interfaces in record time: responsive Single Page Apps, SSR Apps, PWAs, Browser extensions, Hybrid Mobile Apps and Electron Apps. ...
    Downloads: 4 This Week
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  • 8
    Angular

    Angular

    The modern web developer’s platform

    Learn one way to build applications with Angular and reuse your code and abilities to build apps for any deployment target. For web, mobile web, native mobile and native desktop. Achieve the maximum speed possible on the Web Platform today, and take it further, via Web Workers and server-side rendering. Angular puts you in control over scalability. Meet huge data requirements by building data models on RxJS, Immutable.js or another push model.
    Downloads: 9 This Week
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  • 9
    Budibase

    Budibase

    Create business apps and automate workflows in minutes

    Budibase is an open-source low-code platform that saves engineers 100s of hours building forms, portals, and approval apps, securely. Unlike other platforms, with Budibase you build and ship single page applications. Budibase applications have performance baked in and can be designed responsively, providing users with a great experience. Budibase is open-source - licensed as GPL v3. This should fill you with confidence that Budibase will always be around.
    Downloads: 15 This Week
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  • Add Two Lines of Code. Get Full APM. Icon
    Add Two Lines of Code. Get Full APM.

    AppSignal installs in minutes and auto-configures dashboards, alerts, and error tracking.

    Works out of the box for Rails, Django, Express, Phoenix, and more. Monitoring exceptions and performance in no time.
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  • 10
    SST

    SST

    Build serverless apps. Set breakpoints and test your functions locally

    SST is an open-source serverless application platform that deploys to your AWS account, helping you go from idea to IPO. Work on your local Lambda functions lives, without mocking or redeploying your app. Higher-level CDK constructs are made specifically for building serverless apps. Manage the resources in your application with the SST Console. Traditionally, we’ve built and deployed web applications where we have some degree of control over the HTTP requests that are made to our server....
    Downloads: 6 This Week
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  • 11
    shadcn/ui

    shadcn/ui

    Beautifully designed components that you can copy and paste into apps

    Accessible and customizable components that you can copy and paste into your apps. Free. Open Source. Use this to build your own component library.
    Downloads: 5 This Week
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  • 12
    Chainlit

    Chainlit

    Build Python LLM apps in minutes

    Chainlit is an open-source Python package that makes it incredibly fast to build and share LLM apps. Integrate the Chainlit API in your existing code to spawn a ChatGPT-like interface in minutes! Integrate seamlessly with an existing code base or start from scratch in minutes. Understand the intermediary steps that produced an output at a glance. Deep dive into prompts in the Prompt Playground to understand where things went wrong and iterate.
    Downloads: 0 This Week
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  • 13
    inertia

    inertia

    Inertia.js lets you quickly build modern single-page React, Vue

    Create modern single-page React, Vue, and Svelte apps using classic server-side routing. Works with any backend, tuned for Laravel. Inertia is a new approach to building classic server-driven web apps. We call it the modern monolith. Inertia allows you to create fully client-side rendered, single-page apps, without the complexity that comes with modern SPAs. It does this by leveraging existing server-side patterns that you already love.
    Downloads: 0 This Week
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  • 14

    Apollo Client

    Use GraphQL to build client applications

    GraphQL client that will allow you to easily use data from GraphQL with any JavaScript frontend.
    Downloads: 76 This Week
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  • 15
    Clace

    Clace

    AppServer for containerized web app development and deployment

    Easy, lightweight application server for development and deployment of containerized web apps. Supports all languages/frameworks, and runs on Linux, Windows, and OSX. Idle apps scale down to zero. Clace™ is an Apache-2.0 licensed application server for web apps. Clace enables easy and secure hosting and management of multiple web apps written in any language/framework. Clace is cross-platform (Linux/Windows/OSX) and provides a GitOps workflow for managing web apps. Clace implements a...
    Downloads: 4 This Week
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  • 16
    Svelte

    Svelte

    Cybernetically enhanced web apps

    Svelte is a new way to build web applications. It's a compiler that takes your declarative components and converts them into efficient JavaScript that surgically updates the DOM. Svelte shifts as much work as possible out of the browser and into your build step. No more manual optimizations, just faster, more efficient apps. Write breathtakingly concise components using languages you already know, HTML, CSS, and JavaScript.
    Downloads: 2 This Week
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  • 17
    Realm Swift

    Realm Swift

    Realm is a mobile database: a replacement for Core Data & SQLite

    Realm is a fast, scalable alternative to SQLite with mobile to cloud data sync that makes building real-time, reactive mobile apps easy. Build data-rich apps without draining device resources with Realm's lazy loading and zero-copy architecture. The object-oriented data model lets developers work directly with native objects – no ORMs or DAOs are needed. Real-time mobile to cloud data sync makes it easy to build interactive features that keep data up-to-date across multiple devices, users, and the backend. ...
    Downloads: 2 This Week
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  • 18
    openFyde

    openFyde

    openFyde supported hardware "x86 PC with Intel HD graphics

    overlay-amd64-openfyde is the official overlay repository for the amd64 (x86_64) build of openFyde, a Chromium OS-based distribution tailored for developers, power users, and alternative devices outside of Google's supported ChromeOS hardware. openFyde offers a fast, secure, and web-centric desktop experience with support for Linux apps, Android containers, and cloud integration. This overlay includes the custom configurations and firmware patches necessary to optimize openFyde for generic x86_64 devices such as laptops and desktops.
    Downloads: 110 This Week
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  • 19
    realm dotnet

    realm dotnet

    Realm is a mobile database: a replacement for SQLite & ORMs

    Realm is a fast, scalable alternative to SQLite with mobile to cloud data sync that makes building real-time, reactive mobile apps easy. Build data-rich apps without draining device resources with Realm's lazy loading and zero-copy architecture. The object-oriented data model lets developers work directly with native objects – no ORMs or DAOs are needed. Real-time mobile to cloud data sync makes it easy to build interactive features that keep data up-to-date across multiple devices, users, and the backend. ...
    Downloads: 0 This Week
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  • 20
    Payload

    Payload

    Free and Open-source Headless CMS and Application Framework

    Payload has, hands-down, the best developer experience out of any headless CMS. Build whatever you need, however you want, and never hit a functionality roadblock. Payload is the go-to headless CMS for websites, SaaS apps, native apps, and anything else you need to build. Power any website, from enterprise to personal portfolio with Payload as a headless CMS. Its powerful version system and layout-building functionality unlocks the best CMS experience for your editors on the market. ...
    Downloads: 8 This Week
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  • 21
    H2O Wave

    H2O Wave

    Realtime Web Apps and Dashboards for Python and R

    No HTML, CSS, Javascript skills are required. Build rich, interactive web apps using pure Python. Broadcast live information, visualizations, and graphics using Wave's low-latency real-time server. Instant control over every connected web browser using a simple and intuitive programming model. Preview your app live as you code. Dramatically reduce the time and effort to build web apps.
    Downloads: 2 This Week
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  • 22
    Gatsby

    Gatsby

    Build blazing fast, modern apps and websites with React

    Gatsby is a free and open source web framework based on React that allows you to build blazing fast websites and apps. It offers the latest web technologies, such as React.js, Webpack, modern JavaScript, CSS and more to help you build really fast websites. A Progressive Web App generator, it’s fast in every way that matters.
    Downloads: 2 This Week
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  • 23
    Egg

    Egg

    Born to build better enterprise frameworks and apps with Node.js

    Born to build. Better enterprise frameworks and apps with Node.js & Koa. Born to build better enterprise frameworks and apps. Based on open-source ecology, customized for ant-ecology, can be integrated to backend middleware in one minute, supporting multiple deployment environments. Progressive development, smooth learning curve, one-stop development kit, supporting your whole process of development.
    Downloads: 0 This Week
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  • 24
    go-app

    go-app

    A package to build progressive web apps with Go programming

    Go-app is a package for building progressive web apps (PWA) with the Go programming language (Golang) and WebAssembly (Wasm). Shaping a UI is done by using a declarative syntax that creates and composes HTML elements only by using the Go programing language. Served with Go standard HTTP model, apps created with go-app are SEO friendly, installable, and support offline mode. Go-app uses a declarative syntax so you can write reusable component-based UI elements just by using the Go programming...
    Downloads: 0 This Week
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  • 25
    Flet

    Flet

    Flet enables developers to easily build realtime web and mobile apps

    Flet enables developers to easily build real-time web, mobile and desktop apps in Python. No front-end experience is required. An internal tool or a dashboard for your team, weekend project, data entry form, kiosk app or high-fidelity prototype - Flet is an ideal framework to quickly hack great-looking interactive apps to serve a group of users. No more complex architecture with JavaScript frontend, REST API backend, database, cache, etc.
    Downloads: 17 This Week
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