The library for web and native user interfaces.

An API documentation generator for JavaScript.

An extensive math library for JavaScript and Node.js

browser-side require() the node.js way

Algorithmically generated triangle art

This script is the defacto way to enable use of HTML5 sectioning elements in legacy Internet Explorer.

An arbitrary-precision Decimal type for JavaScript

Dedicated to JavaScript and its awesome community since 2015

Graphical User Interface for creating and running Scratch 3.0 projects.

ECMAScript compatibility tables

Bison in JavaScript.

JavaScript library to zip and unzip files supporting parallel compression, web streams, pluggable compression engines, zip64, split files, data encryption, and deflate64 decompression.

a small scripting language for the web

DEPRECATED: Create React apps using typescript with no build configuration.

Browsix is a Unix-like operating system for the browser.

EasyMDE: A simple, beautiful, and embeddable JavaScript Markdown editor. Delightful editing for beginners and experts alike. Features built-in autosaving and spell checking.

ECMAScript 6 compatibility shims for legacy JS engines

Physics plugin for Three.js

High-performance JavaScript polyline simplification library

An advanced static type checker

cubic-bezier implementation for your JavaScript animation easings – MIT License

A reference validator for asm.js.

📐 Javascript Geometric Algebra Generator for Javascript, c++, c#, rust, python. (with operator overloading and algebraic literals) -

HTML5 Game Engine

Virtual Machine used to represent, run, and maintain the state of programs for Scratch 3.0

Virtual file format.

JavaScript media player using Ogg/Vorbis/Theora/Opus/WebM libs compiled with Emscripten

Peggy: Parser generator for JavaScript

A tool to extract data from Open Street Map (OSM) to build the boundaries of the world's timezones.

Save a HTML5 Canvas to GIF and Animations. A port of as3gif GIFPlayer to JS