Assemble
Static site generator for Node.js, Grunt.js, and Yeoman (and soon, Gulp), using the Handlebars template engine. Used by Zurb Foundation, Zurb Ink, H5BP/Effeckt, Less.js / lesscss.org, Topcoat, Web Experience Toolkit, and hundreds of other projects to build sites, themes, components, documentation, blogs and gh-pages. Pull requests welcome, stars appreciated!
Parallel.js
Parallel.js is a tiny library for multi-core processing in Javascript.
Ervy
Bring charts to terminal.
Showdown
JavaScript port of Markdown
Coffee Script
Unfancy JavaScript
Embed.js
A jQuery plugin that analyses the string and automatically embeds emojis, media, maps, tweets, code and services.
Less.js
Leaner CSS
jQuery IME
jQuery based input methods library
Deck.js
Modern HTML Presentations
Javascript Astar
A* Search / Pathfinding Algorithm in Javascript
Emojify.js
A Javascript module to convert Emoji keywords to images
Globalize
A JavaScript library for internationalization and localization that leverages the official Unicode CLDR JSON data
LeapJS
Javascript library for the Leap motion controller
Tinycon
A small library for manipulating the favicon, in particular adding alert bubbles and changing images.
Polyglot.js
Give your JavaScript the ability to speak many languages.
Basket.js
A script and resource loader for caching & loading files with localStorage
Carlo
Web rendering surface for Node applications