Milestone-monsters is a project mainly written in JavaScript, it's free.
Make personal time management into a game
Milestone Monsters -- Make managing tasks and finances into a game! Add tasks, bills, etc. and they become monsters for you to vanquish on your quest to becomming the Milestone Master!
Version: 0.01 Created: Aug 25, 2010 Updated: Dec 8, 2010 Author: Andrew Wooldridge
Credits:
YUI3 - http://developer.yahoo.com/yui/3/