Y! links for developers 
Well a friend of mine just showed me a couple of really cool Developer tools being provided by Y!. Alot of the code deals with Javascript - but if it saves me from trying to write/hack it - all the better. In no particular order the links include Design Patterns (though from the little I have seen it isn’t the traditional “Gang of Four” type), User Interface Library, Connection Manager for XMLhttpRequest objects, and a Javascript Developer Center.
Free stuff is always a good thing.