Impulse is a library for building dynamic physics based interactions, with a focus on mobile web.
Rather than animating properties for a set amount of time, impulse takes a start position, end position, and velocity.
Yhere are some examples of this library such as Chat Heads, pulldownMenu, Inertia Scroll, Oridomi Cover, Bouncy Scrolling.
Scribe is a rich text editor framework for the web platform, with patches for browser inconsistencies and sensible defaults.
Slinky.js is a jQuery plugin to create beautiful scrolling driven navigation lists with stacking headers that remain visible at all times.
ChatJS is a full-featured, lightweight, Facebook style jQuery plugin for instant messaging. ChatJS also comes with a server side implementation for ASP.NET/SignalR out of the box.