moo.fx, a superlightweight javascript effects library. Has a great accordion effect for navigation, or any list you would like to show/hide. Very lightweight as well (3k)!

This javascript class allows you to add a window in an HTML page.

This class is based on Prototype. The code is inspired by the powerful Rating Recommend Print Report

An open-source JavaScript library for creating rich internet applications. Rico provides full Ajax suppor, drag and drop management and a cinematic effects library.

Pretty sweet titles! This javascript displays titles in a fading "tooltip" type window above your links. Check it out!