Workbox : JavaScript Libraries for adding offline support to web apps.
Rickshaw : Rickshaw is a JavaScript toolkit for creating interactive time series graphs.
Zero Clipboard : The Zero Clipboard library provides an easy way to copy text to the clipboard using an invisible Adobe Flash movie, and a JavaScript interface. The "Z...
Filtrr2 : Filtrr2 is a JavaScript image manipulation library. Think of it as Instagram filters on the browser. It uses the element to paint filtered pictures i...
Autotrack : Automatic and enhanced Google Analytics tracking for common user interactions on the web.
Rainbow is a code syntax highlighting library written in Javascript.
It was designed to be lightweight (1.4kb), easy to use, and extendable.
It is completely themable via CSS.