Multiple.js
Sharing background across multiple elements using CSS
Lity
Lightweight responsive lightbox.
Hashgrid
A little tool that inserts a layout grid in web pages, allows you to hold it in place, and toggle between displaying it in the foreground or background.
Droptiles
Droptiles is a "Windows 8 Start" like Metro-style Web 2.0 Dashboard. It compromises of Live Tiles. Tiles are mini apps that can fetch data from external sources. Clicking on a tile launches the full application.
Big Text
jQuery plugin, calculates the font-size and word-spacing needed to match a line of text to a specific width.
jQuery Autocomplete
Ajax Autocomplete for jQuery allows you to easily create autocomplete/autosuggest boxes for text input fields.
Wee
Blueprint for modern web development
Socket.io
Realtime application framework for Node.JS, with HTML5 WebSockets and cross-browser fallbacks support.
Skrollr
Stand-alone parallax scrolling library for mobile (Android + iOS) and desktop. No jQuery. Just plain JavaScript (and some love).
State
Hierarchical finite state machine for TypeScript and JavaScript
Jumly
Rendering engine for UML diagrams in JavaScript
Breathing Halftone
Images go whoa with lots of floaty dots
Hide Show Password
Because life's too short to waste time re-typing passwords.
Fancy Input
Makes typing in input fields fun with CSS3 effects
Angular Validation
Customizing Form Valid Message in AngularJS
Textillate
A simple plugin for CSS3 text animations
Opentip
An open source javascript tooltip based on the protoype framework.