A Gesture Abstraction Library for both MSPointer and WebKit Touch APIs

ThreeSixty and Threesixty-slider.

Good lists – part 1, part 2 – by Smashing Magazine. As always, if you are looking for something more specific, try searching my Zootool bookmarks.

Google-like search in the library of UI design elements, but wait, with source files such as PSD or HTML/CSS.

Lightweight JavaScript library to draw graphs, using the HTML canvas element.

gmaps.js allows you to use the potential of Google Maps in a simple way.
No more extensive documentation or large amount of code.