Animator.js – nice!
Animator.js is a new javascript effects library (like moo.fx and scriptaculous) that is extremely cool.
What impresses me about it is the ease of customizing effects. You basically put in the css that the element your manipulating should have when the effect is done, and thats it.
Though this is new and probably has some bugs, I will definitely be keeping an eye on it. It is very possible that I will use this for LearnIt (rather than Scriptaculous, which I have been using).