base2 : base2 is a lightweight library that irons out all the annoying differences in JavaScript implementations. It provides the additional functionality fro...
Workbox : JavaScript Libraries for adding offline support to web apps.
script.aculo.us : script.aculo.us provides you with
easy-to-use, cross-browser user
interface JavaScript libraries to make
your web sites and web applications fly.
TraceKit : Not all browsers support stack traces on error objects, but TraceKit squeezes out as much useful information as possible and normalizes it.
A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps