Pure CSS3, without javascript. Nice slide down toggle header message.
Chatjs : jQuery plugin for Chatting
ChatJS is a jQuery plugin for instant messaging. It’s completely client-side, so it’s completely platform agnostic. Server side communication is implemented through Adapters. The adapter is the piece of code that is responsible for handling client/server communication. ChatJS comes with a demo adapter that you can see running in the bottom right of this page.
Justified-Gallery : jQuery Justified Grid Plugin
This is a jQuery plugin which allows you to create responsive, infinite, and high quality justified gallery of images.
A common problem, for people who create sites, is to create an elegant image gallery that manages the various sizes and aspect ratio of images. Flickr and Google+ manage this situation in an excellent way, the purpose of this plugin is to give you the power of these solutions, with a new fast algorithm.
Wad : Javascript library for Manipulating Audio
Wad is a Javascript library for manipulating audio using the new HTML5 Web Audio API. It greatly simplifies the process of creating, playing, and manipulating audio, either for real-time playback, or at scheduled intervals. Wad provides a simple interface to use many features one would find in a desktop DAW (digital audio workstation), but doesn’t require the user to worry about sending XHR requests or setting up complex audio graphs.
snapGallery.js : jQuery Responsive Galleries
snapGallery is a super-simple jQuery plugin that converts your unordered, haphazard, differently sized images into a beautiful gallery.
Completely responsive and customizable, snapGallery allows you to select the spacing between images, the minimum width allowed before stacking and the maximum number of columns, with more options on the way!