Browse free open source JavaScript Frameworks and projects below. Use the toggles on the left to filter open source JavaScript Frameworks by OS, license, language, programming language, and project status.

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  • 1
    Meteor

    Meteor

    Meteor, the JavaScript App Platform

    Meteor is a full-stack JavaScript framework that streamlines building real-time web and mobile applications from a single codebase. It couples a Node.js backend with a reactive data system so UI updates propagate automatically when data changes. The framework popularized DDP (a lightweight pub/sub protocol) and a client cache (Minimongo) to mirror server collections on the client for latency-compensated interactions. A batteries-included build system, package ecosystem, and opinionated project structure reduce setup time for accounts, methods, publications, and UI integration. Historically paired with Blaze, Meteor also works well with modern front-end libraries like React, Vue, or Svelte for rendering. Its dev experience focuses on hot reloads, rapid prototyping, and predictable data flow, making it attractive for teams that want real-time features without stitching together many separate tools.
    Downloads: 1 This Week
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  • 2
    Middy

    Middy

    The stylish Node.js middleware engine for AWS Lambda

    Middy is a very simple middleware engine that allows you to simplify your AWS Lambda code when using Node.js. If you have used web frameworks like Express, then you will be familiar with the concepts adopted in Middy and you will be able to get started very quickly. A middleware engine allows you to focus on the strict business logic of your Lambda and then attach additional common elements like authentication, authorization, validation, serialization, etc. in a modular and reusable way by decorating the main business logic. One of the main strengths of serverless and AWS Lambda is that, from a developer perspective, your focus is mostly shifted toward implementing business logic. Anyway, when you are writing a handler, you still have to deal with some common technical concerns outside business logic, like input parsing and validation, output serialization, error handling, etc.
    Downloads: 1 This Week
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  • 3
    Mocha

    Mocha

    A feature-rich JavaScript test framework running on Node.js

    Mocha is a feature-rich JavaScript test framework running on Node.js and in the browser, making asynchronous testing simple and fun. Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases. Hosted on GitHub. Mocha runs in the browser. Every release of Mocha will have new builds of ./mocha.js and ./mocha.css for use in the browser. Mocha is the most-depended-upon module on npm and Mocha is an independent open-source project, maintained exclusively by volunteers. Given Mocha’s use of function expressions to define suites and test cases, it’s straightforward to generate your tests dynamically. No special syntax is required — plain ol’ JavaScript can be used to achieve functionality similar to “parameterized” tests, which you may have seen in other frameworks.
    Downloads: 1 This Week
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  • 4
    Node.js Telegram Bot API

    Node.js Telegram Bot API

    Telegram Bot API for NodeJS

    TelegramBot is an EventEmitter that emits several events. Message, received a new incoming Message of any kind. Depending on the properties of the Message, one of these events may ALSO be emitted, text, audio, document, photo, sticker, video, voice, contact, location, new_chat_members, left_chat_member, new_chat_title, new_chat_photo, delete_chat_photo, group_chat_created, game, pinned_message, poll, dice, migrate_from_chat_id, migrate_to_chat_id, channel_chat_created, supergroup_chat_created, successful_payment, invoice, video_note, etc. Its much better to listen a specific event rather than on message in order to stay safe from the content. Bot must be enabled on inline mode for receive some messages.T elegram only supports HTTPS connections to WebHooks. Therefore, in order to set a WebHook, you will need a SSL certificate. The library makes it easy to get started sending files. By default, you may provide a file-path and the library will handle reading it for you.
    Downloads: 1 This Week
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  • 5
    Pico.css

    Pico.css

    Minimal CSS Framework for semantic HTML

    Minimal CSS Framework for semantic HTML. Elegant styles for all native HTML elements without .classes and dark mode automatically enabled. Pico uses simple native HTML tags as much as possible. Less than 10 .classes are used in Pico. No dependencies, package manager, external files, or JavaScript. Elegant and consistent adaptive spacings and typography on all devices. Shipped with two beautiful color themes, automatically enabled according to the user preference. We use simple native HTML tags as much as possible. Less than 10 .classes are used in Pico. No dependencies, package manager, external files, or JavaScript. Elegant and consistent adaptive spacings and typography on all devices. Shipped with two beautiful color themes, automatically enabled according to the user preference. A classic company or blog layout with a sidebar. A simple layout for Google Amp, with inlined CSS.
    Downloads: 1 This Week
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  • 6
    Preact

    Preact

    Fast 3kB React alternative with the same modern API

    Preact is a lightweight alternative to React that implements the same core component and hooks model in a tiny footprint. It provides a virtual DOM, diffing, and a familiar Component/JSX API, enabling developers to reuse much of their React knowledge. With preact/compat, many React libraries can be used directly, making migration or code sharing practical in performance-sensitive apps. Its focus on size and speed makes it attractive for embedded widgets, mobile web, and scenarios where initial load must be extremely fast. The library embraces modern patterns like functional components, hooks, and context while keeping the API surface minimal. Tooling integrations and ecosystem packages round out the experience, so teams can ship production apps without sacrificing bundle budgets.
    Downloads: 1 This Week
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  • 7
    Qooxdoo JavaScript Framework

    Qooxdoo JavaScript Framework

    qooxdoo - Universal JavaScript Framework

    qooxdoo is a universal JavaScript framework that enables you to create applications for a wide range of platforms. With its object-oriented programming model, you build rich, interactive applications (RIAs), native-like apps for mobile devices, light-weight traditional web applications or even applications to run outside the browser. You leverage its integrated tool chain to develop and deploy applications of any scale while taking advantage of modern web technologies like HTML5 and CSS3, its comprehensive feature set, and a state-of-the-art GUI toolkit. qooxdoo is open source under liberal licenses, led by a dedicated developer team, with a vibrant community. Qooxdoo offers a wide range of widgets and UI components, plus powerful server I/O communication. Built-in unit testing framework with unit tests across the API and User Interface testing.
    Downloads: 1 This Week
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  • 8
    React-Bootstrap

    React-Bootstrap

    Bootstrap components built with React

    React-Bootstrap replaces the Bootstrap JavaScript. Each component has been built from scratch as a true React component, without unneeded dependencies like jQuery. As one of the oldest React libraries, React-Bootstrap has evolved and grown alongside React, making it an excellent choice as your UI foundation. Built with compatibility in mind, we embrace our bootstrap core and strive to be compatible with the world's largest UI ecosystem. By relying entirely on the Bootstrap stylesheet, React-Bootstrap just works with the thousands of Bootstrap themes you already love. The React component model gives us more control over form and function of each component. Each component is implemented with accessibility in mind. The result is a set of accessible-by-default components, over what is possible from plain Bootstrap.
    Downloads: 1 This Week
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  • 9
    Serverless Express by Vendia

    Serverless Express by Vendia

    Run Node.js web applications and APIs using existing frameworks

    Run REST APIs and other web applications using your existing Node.js application framework (Express, Koa, Hapi, Sails, etc.), on top of AWS Lambda and Amazon API Gateway. Vendia is the real-time data cloud for rapidly building applications that securely share data across departments, companies, clouds, and regions. We’re excited to announce the latest release of Vendia Share! This release includes new features like smart contracts, user-level transactions, the beta release of Azure support, and more. We also added a pay-as-you-go pricing plan that gives developers from organizations of any size access to Vendia's enterprise-grade platform for building data-driven, multi-party, cross-cloud apps. If you want to migrate an existing application to AWS Lambda, it's advised to get the minimal example up and running first, and then copy your application source in.
    Downloads: 1 This Week
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  • 10
    Serverless Framework

    Serverless Framework

    The easy and open way to build serverless applications

    Serverless Framework gives you everything you need to build serverless applications on any cloud. It provides structure, workflow automation and best practices out-of-the-box so you can deploy sophisticated serverless architectures. It uses new, event-driven compute services, such as AWS Lambda, Azure Functions, Google CloudFunctions and more. Serverless Framework lets you build apps made up of microservices that run in response to events. These auto-scale and will only charge you when they run, which means lesser costs for application maintenance. You can also create new or extend existing commands with its great selection of community-written plugins.
    Downloads: 1 This Week
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  • 11
    Simorgh

    Simorgh

    The BBC's Open Source Single Page Application

    BBC World Service News websites are rendered using Simorgh, a ReactJS based Single Page Application which also builds Accelerated Mobile Pages (AMP) for every regular HTML page that it renders. Simorgh also renders AMP pages for BBC Public Service News and BBC Sport. Simorgh provides a fast and accessible web experience used by millions of people around the world each month (see list of websites using Simorgh). It is regularly maintained and well documented, and we welcome open-source contributors. Simorgh is primarily maintained by the BBC News Web Engineering teams. It delivers highly trusted news to readers all over the world, currently in (41 languages). We support a wide range of devices and care deeply about scale, performance, and accessibility. We work in agile, flexible teams, and have an exciting roadmap for future development.
    Downloads: 1 This Week
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  • 12
    Sing App Lite

    Sing App Lite

    Free and open-source admin dashboard template built with Bootstrap 4

    Including responsive layout and high-quality UI built with Bootstrap 4.5. This repository contains a limited free version of Sing App. Full bootstrap 4, React with backend, Vue.js, Angular and Angular JS versions are also available and are shipped in a full package. Using this template you will be able to leverage lots of built-in components and thus focus on building features that set you apart from competitors rather than building everything from scratch. Styled Bootstrap components like buttons, modals, etc. All other features like themining, login, additional pages, etc are available in a full version. Building a project from scratch means that there is a lot of things to keep track of all at once, analytics, dynamic forms data, UI and UX elements, and much more. This simple admin template is well suited for web apps or any other website or project that requires admin dashboard. This template will serve as a solid foundation for your upcoming project.
    Downloads: 1 This Week
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  • 13
    Synthetix

    Synthetix

    Synthetix Solidity smart contracts

    Synthetix is a new financial primitive enabling the creation of synthetic assets, offering unique derivatives and exposure to real-world assets on the blockchain. Leveraging the Synthetix debt pool and our innovative liquidity framework, our traders are guaranteed to have some of the best price execution around, with little to no slippage and fills you can’t get elsewhere. Capture the price movements of popular cryptocurrencies, fiat currencies, stocks, commodities and more with zero slippage. Synthetic assets, or Synths, are assets voted into existence by the community and can come in the form of fiat currencies, cryptocurrencies, stocks, commodities and anything else with a price. Many platforms already leverage the deep liquidity and composability of Synthetix to deliver better trades with lower slippage, hedging, and other unique use cases.
    Downloads: 1 This Week
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  • 14
    TenorSpace.js

    TenorSpace.js

    Neural network 3D visualization framework

    TensorSpace is a neural network 3D visualization framework built using TensorFlow.js, Three.js and Tween.js. TensorSpace provides Keras-like APIs to build deep learning layers, load pre-trained models, and generate a 3D visualization in the browser. From TensorSpace, it is intuitive to learn what the model structure is, how the model is trained and how the model predicts the results based on the intermediate information. After preprocessing the model, TensorSpace supports the visualization of pre-trained models from TensorFlow, Keras and TensorFlow.js. TensorSpace is a neural network 3D visualization framework designed for not only showing the basic model structure but also presenting the processes of internal feature abstractions, intermediate data manipulations and final inference generations. By applying TensorSpace API, it is more intuitive to visualize and understand any pre-trained models built by TensorFlow, Keras, TensorFlow.js, etc.
    Downloads: 1 This Week
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  • 15
    Wasp

    Wasp

    A programming language that understands what a web app is

    Wasp (Web Application Specification Language) is a declarative DSL (domain-specific language) for developing, building and deploying modern full-stack web apps with less code. Concepts such as app, page, user, login, frontend, production, etc. are baked into the language, bringing a new level of expressiveness and allowing you to get more work done with fewer lines of code. While describing high-level features with Wasp, you still write the rest of your logic in your favorite technologies (currently React, NodeJS, Prisma). Wasp is in alpha and is therefore likely to change a lot, have bugs and miss important features. Due to its expressiveness, you can create and deploy a production-ready web app from scratch with very few lines of concise, consistent, declarative code. When you need more control than Wasp offers, you can write code in existing technologies such as js/html/css/... and combine it with Wasp code!
    Downloads: 1 This Week
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  • 16
    Web Starter Kit

    Web Starter Kit

    Web Starter Kit - a workflow for multi-device websites

    Web Starter Kit is an opinionated boilerplate for web development. Tools for building a great experience across many devices and performance oriented. Helping you to stay productive following the best practices outlined in Google's Web Fundamentals. A solid starting point for both professionals and newcomers to the industry. A responsive boilerplate optimized for the multi-screen web. Powered by Material Design Lite. You're free to use either this or a completely clean-slate via basic.html. Minify and concatenate JavaScript, CSS, HTML and images to help keep your pages lean. JavaScript code linting is done using ESLint - a pluggable linter tool for identifying and reporting on patterns in JavaScript. Web Starter Kit uses ESLint with eslint-config-google, which tries to follow the Google JavaScript style guide. A built-in server for previewing your site locally while you develop and iterate. Reload the browser in real-time anytime an edit is made without the need for an extension.
    Downloads: 1 This Week
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  • 17
    Ziggy

    Ziggy

    Use your Laravel routes in JavaScript

    Ziggy provides a JavaScript route() function that works like Laravel's, making it a breeze to use your named Laravel routes in JavaScript. Ziggy supports Laravel's route-model binding, and can even recognize custom route key names. If you pass route() a JavaScript object as a route parameter, Ziggy will use the registered route-model binding keys for that route to find the correct parameter value inside the object. If no route-model binding keys are explicitly registered for a parameter, Ziggy will use the object's id key.
    Downloads: 1 This Week
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  • 18
    bootstrap-select

    bootstrap-select

    The jQuery plugin that brings select elements into the 21st century

    The jQuery plugin that brings select elements into the 21st century with intuitive multiselection, searching, and much more. Now with Bootstrap 4 support. Bootstrap-select requires jQuery v1.9.1+, Bootstrap’s dropdown.js component, and Bootstrap's CSS. If you're not already using Bootstrap in your project, a precompiled version of the Bootstrap v3.4.1 minimum requirements can be downloaded. If using bootstrap-select with Bootstrap v4+, you'll also need Popper.js. For all of Bootstrap v4's requirements, see Getting started. A precompiled version of the requirements will be made available in an upcoming release of bootstrap-select. Bootstrap 4 only works with bootstrap-select v1.13.0+. By default, bootstrap-select automatically detects the version of Bootstrap being used. However, there are some instances where the version detection won't work.
    Downloads: 1 This Week
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  • 19
    jsdom

    jsdom

    JavaScript implementation of various web standards, for use with Node

    jsdom is a pure-JavaScript implementation of many web standards, notably the WHATWG DOM and HTML Standards, for use with Node.js. In general, the goal of the project is to emulate enough of a subset of a web browser to be useful for testing and scraping real-world web applications. The latest versions of jsdom require Node.js v10 or newer. To use jsdom, you will primarily use the JSDOM constructor, which is a named export of the jsdom main module. Pass the constructor a string. The resulting object is an instance of the JSDOM class, which contains a number of useful properties and methods besides window. In general, it can be used to act on the jsdom from the "outside," doing things that are not possible with the normal DOM APIs. For simple cases, where you don't need any of this functionality, we recommend a coding pattern.
    Downloads: 1 This Week
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  • 20
    layui

    layui

    Classic modular front-end UI framework

    Created by professional front-end, for full-level front-end and back-end developers, a low-threshold, out-of-the-box front-end UI solution. Layui (homonym: UI-like) is a front-end UI framework written with its own module specifications, following the writing and organization of native HTML/CSS/JS, with a very low threshold and ready to use. Its exterior is minimalist, but it does not lose its fullness. The volume is light and the components are abundant. Every detail from the core code to the API has been carefully crafted, which is very suitable for the rapid development of the interface. The first version of layui was released in the golden autumn of 2016. It is different from those UI frameworks based on the underlying MVVM.
    Downloads: 1 This Week
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  • 21
    nrg

    nrg

    A batteries-included web framework for Node.js

    A batteries-included Node.js web framework.
    Downloads: 1 This Week
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  • 22
    solgraph

    solgraph

    Visualize Solidity control flow for smart contract security analysis

    Visualize Solidity control flow for smart contract security analysis. Generates a DOT graph that visualizes the function control flow of a Solidity contract and highlights potential security vulnerabilities. A nice example of piping contract source that is in your clipboard through solgraph, dot, and preview: (Use whatever image previewer is available on your system; Preview.app is available on Mac) You have to have graphviz installed (brew install graphviz) to render the DOT file as an image. Depending on your permissions, you may need to add the unsafe-perm flag.
    Downloads: 1 This Week
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  • 23
    The AJAX JSP Tag Library is a set of JSP tags that simplify the use of Asynchronous JavaScript and XML (AJAX) technology in JavaServer Pages. Development moved to Mercurial
    Downloads: 13 This Week
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  • 24
    ImpressCMS

    ImpressCMS

    Make a lasting impression!

    Community websites can be difficult to maintain and a target for hackers. But, not with ImpressCMS behind it. Started in 2007 by a talented and committed group of developers and designers unhappy with the progress of the projects they were working on, ImpressCMS continues to lead in providing secure, easy to build and maintain community websites. ImpressCMS is built using PHP and MySQL, and employs JavaScript and Smarty and is optimized for performance - on even shared hosts. Secure. Easy. Open. Friendly.
    Downloads: 4 This Week
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  • 25
    Scrolling Game Development Kit 2
    All-in-one program for creating 2D scrolling games. Compile your games into stand-alone .NET executables or customizable C# source code. The IDE and framework are build on OpenTK, which wraps OpenGL, so generated games can be cross-platform.
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    Downloads: 5 This Week
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