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

  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
    Try It Free
  • 99.99% Uptime for MySQL and PostgreSQL Databases Icon
    99.99% Uptime for MySQL and PostgreSQL Databases

    Sub-second maintenance. 2x read/write performance. Built-in vector search for AI apps.

    Cloud SQL Enterprise Plus delivers near-zero downtime with 35 days of point-in-time recovery. Supports MySQL, PostgreSQL, and SQL Server.
    Try Free
  • 1
    Phaser Raycaster

    Phaser Raycaster

    Raycasting plugin for Phaser 3

    Phaser Raycaster is a plugin for Phaser 3 that implements raycasting functionality, enabling developers to simulate visibility, lighting, and field-of-view mechanics in their games.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    PhotoJShop

    PhotoJShop

    Photo editing JavaScript library

    PhotoJShop is a JavaScript library for photo editing using the canvas and kernel convolution matrixes, aiming to reproduce the most usual filters. A demo of its capabilities can be seen in Nuophoto, a project that uses this library for all the editing. The idea is to provide a simple library to developers that will allow quick integration of photo filters to their website. After including jQuery, include photojshop.jquery.js. Once loaded you simply need to call it on a valid element. You have to ensure that the element has loaded, $(document).ready() doesn't mean images have loaded.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3

    Polymer

    A Web Component library

    Polymer is a lightweight Web Components library that lets you create encapsulated Web Components that work just like standard HTML elements. These elements can be used in building web applications and are reusable. Polymer can be particularly useful when building UI components. Instead of having to constantly rebuild components such as a specific navigation bar or button in different frameworks and for different projects, simply define this component once with Polymer, and you can use it again and again in your future projects. Because Polymer is built on top of the web standards-based Web Components APIs, custom HTML elements made from it are built totally from the platform up and are interoperable across frameworks. Polymer also works across all major browsers.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    PowerTip

    PowerTip

    A jQuery plugin that creates hover tooltips

    PowerTip is a jQuery tooltip plugin with some advanced features like hover intent testing, tooltip queueing, and support for complex data.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Cut Data Warehouse Costs by 54% Icon
    Cut Data Warehouse Costs by 54%

    Easily migrate from Snowflake, Redshift, or Databricks with free tools.

    BigQuery delivers 54% lower TCO with exabyte scale and flexible pricing. Free migration tools handle the SQL translation automatically.
    Try Free
  • 5
    PrimeReact

    PrimeReact

    The Most Complete React UI Component Library

    Elevate your web applications with PrimeReact's comprehensive suite of customizable, feature-rich UI components. With PrimeReact, turning your development vision into reality has never been easier. The ultimate set of UI Components to assist you with 80+ impressive React Components. Choose from a variety of pre-built themes or implement your design systems with the CSS library of your choice like TailwindCSS. Connect with the other open-source community members, collaborate, and have a voice in the project roadmap. Compliant with the Web Content Accessibility Guidelines (WCAG 2.0). Exceptional support service featuring response within 1 business day and the option to request enhancements and new features for the library. First-class support for responsive design led by touch-optimized elements. 400+ pre-designed copy paste ready UI blocks to build spectacular apps in no time.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    PrimeVue

    PrimeVue

    Next Generation Vue UI Component Library

    PrimeVue is a full-featured UI component suite for Vue.js that provides developers with a rich set of customizable components, templates, and design resources for building modern web applications. It is part of the broader Prime ecosystem, which includes similar libraries for other frameworks, and is designed to maximize developer productivity through reusable UI building blocks. The library offers dozens of components covering common interface needs such as forms, data tables, charts, navigation, and layout systems, along with advanced features like accessibility compliance and responsive design. PrimeVue supports both styled and unstyled modes, allowing developers to either use built-in themes or fully customize the appearance using external CSS frameworks like Tailwind. Its architecture includes a monorepo structure with modular packages for core functionality, icons, themes, and integrations with tools like Nuxt.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Protip

    Protip

    A new generation jQuery Tooltip plugin

    A new generation jQuery Tooltip plugin.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Prudence is an open source container and framework for scalable web frontends and network services, based on proven REST principles. It comes in several flavors: Python, Ruby, Clojure, JavaScript, PHP and Groovy.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    Pusher Channels Javascript Client

    Pusher Channels Javascript Client

    Pusher Javascript library

    Bi-directional hosted APIs that are flexible, scalable and easy to use. We create and maintain complex messaging infrastructure so you can build the realtime features your users need, fast.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 10
    Pushy jQuery

    Pushy jQuery

    Pushy is a responsive off-canvas navigation menu using CSS transforms

    Pushy is a responsive off-canvas navigation menu using CSS transforms & transitions. This project was inspired by the off-canvas navigation menu seen on Medium. Pushy has been implemented on many sites, check them out! Feel free to contact me if you use Pushy in one of your websites. Pushy has been featured on the Treehouse Show and in a book.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    QBPWCF

    QBPWCF

    PHP library for not only web-based application in Fedora Linux

    此專案的目的是要建立簡單、易用、參數說明完整且富有調整性的PHP元件庫,讓PHP程式設計開發者可以輕鬆地建立高度客製化的應用。 套用當代的術語而言,就是要作為LOW CODE平台的函式庫。
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Qoa

    Qoa

    Minimal interactive command-line prompts library

    Qoa is a lightweight command-line prompt library for Node.js. It helps developers collect user input through simple, interactive, and configurable terminal prompts. The library has no external dependencies, which makes it small, fast, and easy to add to CLI tools. It includes seven prompt types, covering plain input, confirmation, password-style hidden input, single-key input, quizzes, and navigable choices. Qoa can run prompts sequentially through one async prompt function or individually through each prompt’s own async method. It is best suited for developers who want clean terminal interactions without adding a heavy prompt framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13

    QuadTree JS

    QuadTree JS is a library for game developers

    QuadTree JS is a library implemented in JavaScript for game developers whose want to reduce number of intersection detections in they games. It's licensed on LGPL v3.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    QuoJS

    QuoJS

    Micro #JavaScript Library for Mobile Devices

    QuoJS is a lightweight JavaScript library aimed at building mobile-first web interfaces with a focus on touch interactions and simple DOM utilities. It provides a compact, jQuery-like API for element selection, traversal, and manipulation, but trims the surface area to keep payloads small for mobile browsers. A core feature set centers on high-level touch gestures—such as tap, double-tap, swipe, pinch, and long-tap—abstracting away platform quirks so developers can attach handlers consistently across devices. The library embraces modern browser features and CSS3 where available, offering helpers that make common mobile UI patterns feel responsive and fluid. Because it is intentionally minimal, QuoJS plays well as a drop-in alongside other client libraries when you only need fast gestures and a few utilities rather than a full framework. Its API is designed to be readable and chainable.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    RAIN
    RAIN is a JavaScript API under development for the new CodeMeteor website. It contains functions and classes to make it easier to write JavaScript based websites.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    RTCMultiConnection

    RTCMultiConnection

    RTCMultiConnection is a WebRTC JavaScript library

    RTCMultiConnection is a JavaScript library for building peer-to-peer WebRTC applications in the browser. It helps developers create audio calls, video calls, screen sharing, file sharing, and media streaming experiences. The project abstracts many low-level WebRTC details so applications can focus on rooms, sessions, users, and media behavior. It works with a separate Socket.IO signaling server that handles connection setup between peers. The repository includes demos, documentation links, installation guidance, and integration notes for Node.js applications. It is useful for developers prototyping real-time communication apps without building every WebRTC layer manually.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    RWD Freeze Table

    RWD Freeze Table

    RWD Table with freezing head and columns for jQuery

    RWD Table with freezing head and columns for jQuery. Freeze the head rows and columns for a large table with RWD. Optional features such as Freeze Scroll Bar. Namespace support for multiple tables.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Raken, web service controller, is based on JSON as a data definition language. it utilizes simple protocol, optional asynchronous interaction, recovery, localization, security, caching, batch, and multi-part messaging.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Raphaël

    Raphaël

    JavaScript vector library

    Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or image crop and rotate widget, for example, you can achieve it simply and easily with this library. Raphaël ['ræfeɪəl] uses the SVG W3C Recommendation and VML as a base for creating graphics. This means every graphical object you create is also a DOM object, so you can attach JavaScript event handlers or modify them later. Raphaël’s goal is to provide an adapter that will make drawing vector art compatible cross-browser and easy. Raphaël currently supports Firefox 3.0+, Safari 3.0+, Chrome 5.0+, Opera 9.5+ and Internet Explorer 6.0+. Versions will be released as we gather and test new PRs. As there are a lot of browsers being supported it might take a while to accept a PR, we will use the feedback from other users too. You can use the raphaelTest.html to try things, you need to start a server in the root dir to start testing things there.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    It's an infrastructure helps engineers to develop enterprise software solutions in Microsoft .NET easily and productively which consists of an extendable and maintainable web system architecture with a suite of generic business model, APIs and servi
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    RateIt

    RateIt

    Rating plugin for jQuery. Fast, Progressive enhancement, touch support

    Rating plugin for jQuery. Fast, Progressive enhancement, touch support, customizable (just swap out the images, or change some CSS), Unobtrusive JavaScript (using HTML5 data-* attributes), RTL support, supports as many stars as you'd like, and also any step size. Although it does the same job as the rest of the jQuery star rating plugins, the main difference is its simplicity. Most plugins create an element for each (partial) star, be it a div with a star background, or an img tag. Each of these tags gets a hover event, and a click event. And on these hover/click events it has to go and talk to the other stars, telling them to change their state.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22

    ReCaptcha plugin for Kooboo CMS

    ReCaptcha Validator Plugin for Kooboo CMS for add content or send mail

    ReCaptcha Validator Plugin for Kooboo CMS for adding content or sending feedback e-mail
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    React Beautiful DnD

    React Beautiful DnD

    Beautiful and accessible drag and drop for lists with React

    React Beautiful DnD is a drag-and-drop library for React that emphasizes fluid motion, accessibility, and natural constraints. It provides Draggable and Droppable primitives that manage state, sensors, and reordering logic for you, so you focus on rendering. Keyboard support, screen-reader announcements, and predictable focus handling make interactions accessible beyond the mouse. The library computes dimensions and movement carefully to avoid jank, including automatic scrolling and collision handling when lists overflow. It supports common patterns like reordering within a list, moving items between multiple lists, and integrating with virtualized lists. Clear lifecycle callbacks expose what changed during a drag so you can persist updates or trigger side effects reliably.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    React Demos

    React Demos

    A collection of simple demos of React.js

    This repository is a curated collection of small, focused React examples intended to illustrate core concepts through runnable code. Each demo isolates a single idea—such as component composition, state and props, lifecycle hooks, or event handling—so learners can see cause and effect without framework noise. The code favors clarity over abstraction, making it easy to copy, tweak, and compare different approaches to the same problem. Many examples are deliberately minimal, showing just enough HTML, CSS, and JavaScript to highlight the React pattern being taught. The structure encourages hands-on learning: open a demo, modify a prop or state update, and observe how the UI reacts. It works well as a study companion for beginners or as a quick refresher before building larger applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    React Native Vector Icons

    React Native Vector Icons

    Customizable Icons for React Native with full styling

    Perfect for buttons, logos and nav/tab bars. Easy to extend, style and integrate into your project. If you want to use any of the bundled icons, you need to add the icon fonts to your Xcode project. For each platform (iOS/Android/Windows) you plan to use, follow one of the options for the corresponding platform. Upgrading this package often requires the font files linked to your projects to be updated as well. If the automatic linking works for you, running this again should update the fonts. You can either use one of the bundled icons supported or roll your own custom font. Since Icon builds on top of the Text component, most style properties will work as expected, you might find it useful to play around with background color, border width, border color, border radius, padding, margin, color, font size, etc.
    Downloads: 0 This Week
    Last Update:
    See Project