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
Textillate
A simple plugin for CSS3 text animations
Opentip
An open source javascript tooltip based on the protoype framework.
Img Liquid
jQuery plugin to resize images to fit in a container.
Hallo
Simple rich text editor (contentEditable) for jQuery UI
Egjs Flicking
:carousel_horse: :recycle: Simple module to implement flicking carousel interaction
Anijs
Declarative handling library for CSS animations.
Jquery.payment
A general purpose library for building credit card forms, validating inputs and formatting numbers.