I have discovered today "SimpleJS" which is a new and really cool JavaScript library that will allow you to create very good and Web 2.0 effects. This small project as mentionned by the author himself, isn't comparable to the big one as Prototype, Mootools or JQuery but it will permit to any developer to create small effects without difficulty. Moreover, it is very light, only 14ko and the official website proposes some examples.

It is compatible with IE7(Beta), Firefox 2.0 et Opera 2.0

The version 0.02.beta is available here : simpleJS002a.zip

Official website : http://simplejs.bleebot.com/