It’s been said a thousand times I’m sure, but picking the right JavaScript framework is a pain. There are all sorts of biased arguments for one vs. another, but there’s really nothing subjective out there… until now. Arguably, jQuery is probably the most popular JS framework out in the wild, but that doesn’t always mean it’s the best choice. What you choose should really depend on what you’re trying to do. Aaron Newton of Clientcide has put together a really impressive look at jQuery vs. MooTools, which doesn’t categorically say one is better than the other, but, rather, goes into detail about why one framework is better than the other based on your needs. Definitely worth a read:
www.jqueryvsmootools.com