Wordcount.js
Calculate file newlines, word, and byte counts on client side using HTML5 File API. (Emulates Linux's wc command)
Code Blast Codemirror
Particles blasts while typing in Codemirror
Cutter.js
Truncate HTML code to limit its length by number of words without losing markup.
Polyglot.js
Give your JavaScript the ability to speak many languages.
Gitdown
GitHub markdown preprocessor.
Globalize
A JavaScript library for internationalization and localization that leverages the official Unicode CLDR JSON data
Remarkable
Markdown parser, done right. Commonmark support, extensions, syntax plugins, high speed - all in one.
Purl
A JS utility for for parsing URLs and extracting information out of them.
Idle.js
Javascript activity library for the browser. (away, idle, etc)
Catiline
JavaScript library to take the pain out of web workers.
Medium Editor Insert Plugin
jQuery insert plugin for MediumEditor (Medium.com WYSIWYG editor clone)
Adapt
Adapt.js serves CSS based on screen width.
Mdb Vue Ui Kit
Vue 3 & Bootstrap 5 & Material Design 2.0 UI KIT
Instafeed.js
A simple Instagram javascript plugin
Rule Reactor
A light weight, fast, expressive forward chaining business rule engine leveraging JavaScript internals, lazy cross-products, and Functions as objects rather than Rete. NOTE: The master branch is the front edge of development. If you desire a more tested version, use the npm package.
Jso
A javascript OAuth 2.0 library
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!