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.

  • Build Agents and Models on One Platform Icon
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  • 1
    socket.io

    socket.io

    Realtime application framework (Node.JS server)

    socket.io is a JavaScript library that allows for realtime, bi-directional communication between web clients and servers. It is composed of two parts: a Node.js server and a JavaScript client library that runs in the browser. socket.io is focused on both reliability and speed, delivering an immensely powerful, fast and yet easy to use realtime engine that’s used by just about everyone: from Microsoft Office and Zendesk to hackathon winners and small startups. It’s considered one of the most depended-upon npm modules, and works on every platform, browser or device.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 2
    ZK - Simply Ajax and Mobile
    ZK is an open-source Java framework for building modern web and mobile applications. It enables developers to create rich, interactive UIs using only Java — no JavaScript required. With 200+ Ajax-powered components, event-driven architecture, and support for popular technologies like Spring, Java EE, and JSP/JSF, ZK makes it simple to deliver powerful and user-friendly web applications.
    Downloads: 40 This Week
    Last Update:
    See Project
  • 3
    Axe

    Axe

    Logger-agnostic wrapper that normalizes logs regardless of arg style

    Logger-agnostic wrapper that normalizes logs regardless of arg style. Great for large dev teams, old/new projects, and works w/Pino, Bunyan, Winston, console, and more. It is lightweight, performant, highly-configurable, and automatically adds OS, CPU, and Git information to your logs. Hooks, dot-notation remap, omit, and pick of metadata. Axe was built to provide consistency among development teams when it comes to logging. You not only have to worry about your development team using the same approach to writing logs and debugging applications, but you also have to consider that open-source maintainers implement logging differently in their packages. No matter how your team or underlying package style arguments when invoked with logger methods, Axe will clean it up and normalize it for you. This is especially helpful as you can see outliers much more easily in your logging dashboards, and pinpoint where in your application you need to do a better job of logging at.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 4
    Bootbox

    Bootbox

    Wrappers for JavaScript alert(), confirm() and other flexible dialogs

    Bootbox.js is a small JavaScript library which allows you to create programmatic dialog boxes using Bootstrap modals, without having to worry about creating, managing, or removing any of the required DOM elements or JavaScript event handlers. Bootbox provides three functions, alert, confirm, and prompt, whose aim is to mimic their native JavaScript equivalents. Each Bootbox function calls a fourth public function, dialog, which you can use to create your own custom dialogs. See the Documentation for usage and to learn which options are available for each function. Tests are run using Karma using the Mocha test adapter. To run the tests yourself, simply run npm install within the project followed by npm test. Please note that this will require PhantomJS being installed and in your path - if it is not, you may run the tests and capture browsers manually by running karma start from the root of the project.
    Downloads: 9 This Week
    Last Update:
    See Project
  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

    BigQuery automates data prep, analysis, and predictions with built-in AI assistance.

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  • 5
    ButterCMS JS client

    ButterCMS JS client

    Node/JS API client for ButterCMS

    A seamless CMS with a blazing fast API and marketing dashboard. Stop wasting dev time and free your marketers from your legacy CMS.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 6
    Coinbase Pro

    Coinbase Pro

    The official Node.js library for Coinbase Pro

    Note: The gdax package is deprecated and might have to be removed from NPM. Please migrate to the coinbase-pro package to ensure future compatibility. Easy functionality to use in programmatic trading. A customizable, websocket-synced Order Book implementation. API clients with convenient methods for every API endpoint. Abstracted interfaces, don't worry about HMAC signing or JSON formatting; the library does it for you. To use optional parameters with callbacks, supply the options as the first parameter(s) and the callback as the last parameter.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 7
    Emittery

    Emittery

    Simple and modern async event emitter

    A modern, TypeScript-based event emitter for JavaScript applications, providing an intuitive API for managing events in Node.js and browsers.
    Downloads: 9 This Week
    Last Update:
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  • 8
    Fastify

    Fastify

    Fast and low overhead web framework, for Node.js

    Fastify is a high-performance web framework for Node.js that focuses on minimal overhead and predictable extensibility. It pairs a declarative routing API with JSON Schema–driven validation and serialization, so requests are checked at the edge and responses are produced quickly. The framework’s plugin system uses encapsulation to isolate routes, decorators, and hooks, which keeps large codebases modular and avoids accidental cross-pollution. Built-in hooks (such as onRequest, preHandler, and onSend) and lightweight decorators make it easy to insert cross-cutting concerns like auth, caching, and metrics. Fastify ships with thoughtful defaults like structured logging via Pino and AJV for schema validation, and it has first-class TypeScript types. The result is a server stack that scales to high throughput while remaining easy to reason about in production.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 9
    GeoNode

    GeoNode

    GeoNode is an open source platform for geospatial data

    GeoNode is a geospatial content management system, a platform for the management and publication of geospatial data. It brings together mature and stable open-source software projects under a consistent and easy-to-use interface allowing non-specialized users to share data and create interactive maps. Data management tools built into GeoNode allow for integrated creation of data, metadata, and map visualization. Each dataset in the system can be shared publicly or restricted to allow access to only specific users. Social features like user profiles and commenting and rating systems allow for the development of communities around each platform to facilitate the use, management, and quality control of the data the GeoNode instance contains. It is also designed to be a flexible platform that software developers can extend, modify or integrate against to meet requirements in their own applications.
    Downloads: 9 This Week
    Last Update:
    See Project
  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

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  • 10
    Grommet

    Grommet

    React-based framework that provides accessibility, modularity, etc.

    Streamline the way you develop apps. Build responsive and accessible mobile-first projects for the web with an easy-to-use component library. part design system, part framework, and all awesome. grommet is a React-based framework that provides accessibility, modularity, responsiveness, and themes in a tidy package. Tailor composite components with grommet. embrace atomic design methods and build a library that fits your needs. Keyboard navigation, screen reader tags, and more. grommet provides support for W3c’s WCAG 2.1 spec out of the box. Tailor the component library to align with your Color, Type, and Layout needs. you can even control component interaction. Support all the devices! Use Flexbox and CSS Grid to provide layouts for all those new phones and widescreen displays. Already working on a project, starting fresh, or just want to poke around and see how all this junk works?
    Downloads: 9 This Week
    Last Update:
    See Project
  • 11
    Milligram

    Milligram

    A minimalist CSS framework

    Milligram provides a minimal setup of styles for a fast and clean starting point. Just it! Only 2kb gzipped! It's not about a UI framework. Specially designed for better performance and higher productivity with fewer properties to reset resulting in cleaner code. Hope you enjoy it! There are some ways to get started. First, see all download options available below, then choose the most suitable option for your need. Now you should add the main file of the Milligram and the CSS Reset in the header of your project. Just that! The Button, an essential part of any user experience. Buttons come in three basic styles in Milligram: The button element has flat color by default, whereas .button-outline has a simple outline around, and .button-clear is entirely clear. The List is a very versatile and common way to display items. Milligram has three types of lists.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 12
    NW.js

    NW.js

    Call all Node.js modules directly from DOM/WebWorker

    NW.js (formerly node-webkit) is a desktop runtime that combines Chromium with Node.js, allowing developers to build native applications using web technologies. It gives web pages direct access to Node modules and system resources from within the browser context, simplifying tasks like file I/O, process spawning, and OS integration. Apps are packaged with the runtime, ensuring consistent behavior across Windows, macOS, and Linux. The project supports custom window controls, tray menus, and native dialogs, enabling polished desktop UX beyond a plain browser shell. Its packaging and auto-update options help teams distribute binaries without external dependencies. NW.js is often chosen for projects that value direct DOM-to-Node interop and a straightforward migration path from existing web apps to desktop.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 13
    Parse Server

    Parse Server

    API server module for Node/Express

    Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box. Our preferred channels of communication for help, issues and disscussion. Parse Server works with the Express web application framework. It can be added to existing web applications, or run by itself. Parse Server is continuously tested with the most recent releases of Node.js to ensure compatibility. We follow the Node.js Long Term Support plan and only test against versions that are officially supported and have not reached their end-of-life date. You can use any arbitrary string as your application id and master key. These will be used by your clients to authenticate with the Parse Server. Parse provides SDKs for all the major platforms.
    Downloads: 9 This Week
    Last Update:
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  • 14
    RESTful API Node Server Boilerplate

    RESTful API Node Server Boilerplate

    A boilerplate for building production-ready RESTful APIs using Node.js

    A boilerplate/starter project for quickly building RESTful APIs using Node.js, Express, and Mongoose. By running a single command, you will get a production-ready Node.js app installed and fully configured on your machine. The app comes with many built-in features, such as authentication using JWT, request validation, unit and integration tests, continuous integration, docker support, API documentation, pagination, etc. The app has a utility ApiError class to which you can attach a response code and a message, and then throw it from anywhere (catchAsync will catch it). Request data is validated using Joi. Check the documentation for more details on how to write Joi validation schemas. In production mode, only info, warn, and error logs will be printed to the console. It is up to the server (or process manager) to actually read them from the console and store them in log files.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 15
    SQUEEZER

    SQUEEZER

    Squeezer framework, build serverless dApps

    Squeezer is a platform that empowers new-entry blockchain developers to build serverless dApps simply as dead. The main usage of the ChainKit is to unify top blockchains interfaces into a single normalized API interface, therefore you can build blockchain dApps easily without digging into blockchain complex infrastructure. Bi-directional on-chain transactions (inbound and outbound). Build dApps connecting to smart contracts using chain kit agnostic connector. Quick intuitive code deployments by using a special mechanism that will deploy smart contracts and dApp services where code changed. Silent deployments, no interruption for the current functionality (really useful on production). One single command to simultaneously deploy all available functions on your project where code changed from the last deployment. Test your code locally on a simulated functions platform for a faster development cycle.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 16
    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: 9 This Week
    Last Update:
    See Project
  • 17
    chai

    chai

    BDD / TDD assertion framework for node.js

    Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework. Chai has several interfaces that allow the developer to choose the most comfortable. The chain-capable BDD styles provide an expressive language & readable style, while the TDD assert style provides a more classical feel. Plugins extend Chai's assertions to new contexts such as vendor integration & object construction. Developers can build their own plugins to share with community or use the plugin pattern to DRY up existing tests. You can also use it within the browser; install via npm and use the chai.js file found within the download. Browse our growing directory of custom plugins & vendor integrations to find the best tool for your needs. Chai has an extensive utility belt for plugin developers. Learn how to build your plugins & share.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 18
    electron-store

    electron-store

    Simple data persistence for your Electron app or module

    Simple data persistence for your Electron app or module. Save and load user preferences, app state, cache, etc. Electron doesn't have a built-in way to persist user preferences and other data. This module handles that for you, so you can focus on building your app. You can use this module directly in both the main and renderer process. For use in the renderer process only, you need to call Store.initRenderer() in the main process, or create a new Store instance (new Store()) in the main process. Changes are written to disk atomically, so if the process crashes during a write, it will not corrupt the existing config. Under the hood, the JSON Schema validator ajv is used to validate your config. We use JSON Schema draft-07 and support all validation keywords and formats. You should define your schema as an object where each key is the name of your data's property and each value is a JSON schema used to validate that property.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 19
    koa-better-serve

    koa-better-serve

    Small, simple and correct serving of files, using `koa-send`

    Small, simple and correct serving of files, using koa-send.
    Downloads: 9 This Week
    Last Update:
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  • 20
    koa-cash

    koa-cash

    HTTP response caching for Koa. Supports Redis, in-memory store, etc.

    HTTP response caching for Koa. Supports Redis, in-memory store, and more.
    Downloads: 9 This Week
    Last Update:
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  • 21
    koa-helmet

    koa-helmet

    Important security headers for koa

    koa-helmet is a wrapper for helmet to work with koa. It provides important security headers to make your app more secure by default.
    Downloads: 9 This Week
    Last Update:
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  • 22
    node-rate-limiter-flexible

    node-rate-limiter-flexible

    Count and limit requests by key with atomic increments

    rate-limiter-flexible counts and limits number of actions by key and protects from DDoS and brute force attacks at any scale. It works with Redis, process Memory, Cluster or PM2, Memcached, MongoDB, MySQL, PostgreSQL and allows to control of requests rate in single process or distributed environment. All operations in memory or distributed environments use atomic increments against race conditions. Combine limiters, block key for some duration, delay actions, manage failover with insurance options, configure smart key blocking in memory and many others. Average request takes 0.7ms in Cluster and 2.5ms in a Distributed application. See benchmarks. It provides a unified API for all limiters. Whenever your application grows, it is ready. Prepare your limiters in minutes. No matter which node package you prefer: redis or ioredis, sequelize/typeorm or knex, memcached, native driver or mongoose. It works with all of them.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 23
    rax

    rax

    A progressive React framework for building universal application

    Ultra-lightweight, high-performance, easy-to-use front-end solution. One-time development and multi-terminal operation, liberating repetitive work, focusing on product logic, and improving development efficiency. The Rax 1.0 system provides a wealth of components and APIs to help business students quickly develop multi-terminal projects. Go Rax is a Rax 1.0 sample app, which is provided for Rax developers for reference and learning. Rax improves the product experience through a lighter core, progressive web applications, and server-side rendering. The out-of-the-box engineering, rich components and surrounding ecology, and one-time development and multi-end delivery help the developer complete his creativity. At the same time, we are also continuing to explore in the field of artificial intelligence, and continue to reduce development thresholds and costs.
    Downloads: 9 This Week
    Last Update:
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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: 42 This Week
    Last Update:
    See Project
  • 25
    Appium

    Appium

    Automation for iOS, Android, and Windows Apps

    Appium is an open source test automation framework for use with native, hybrid and mobile web apps. It drives iOS, Android, and Windows apps using the WebDriver protocol. Is native app automation missing from your tool belt? Problem solved. Appium is built on the idea that testing native apps shouldn't require including an SDK or recompiling your app. And that you should be able to use your preferred test practices, frameworks, and tools. Appium is an open source project and has made design and tool decisions to encourage a vibrant contributing community. Appium aims to automate any mobile app from any language and any test framework, with full access to back-end APIs and DBs from test code. Write tests with your favorite dev tools using all the above programming languages, and probably more (with the Selenium WebDriver API and language-specific client libraries).
    Downloads: 8 This Week
    Last Update:
    See Project