POTM for May: jQuery
There was a time when I hated Javascript. I'm sure many people hated Javascript at one point. Many still do. Back in the 90s, Javascript seemed to exist primarily to confuse web developers, to provide buggy stock code that designers could copy and paste to provide pointless effects that broke in every browser but the one they were using, and to make web pages cute and therefore unusable.
In the modern day, though, that has changed. Javascript is now cool, and actually fun to program in. There are two main reasons for that, in my experience: browsers that only mostly suck instead of completely suck, and jQuery.