Which JavaScript AJAX Framework is most powerful and very lightweight?

Question

I\'ve been using jQuery to do the whole AJAX magic in my web based applications. But I came to a decision that I don’t need all these amazing features jQuery has, except its

Answer 1

If you need to use ONLY ajax features take a look at sajax or custom MooTools. Of course, if you are a "lightweight freak" you can write your own routine for this (should be less than 50 lines)