IT, computer and programming tutorials and tips that i couldnt find anywhere else using google, from my daily work as a Senior Developer of solutions using Java and Linux.
The best place to *find* answers to programming/development questions, imo, however it's the *worst* place to *ask* questions (if your first question/comment doesn't get any up-rating/response, then u can't ask anymore questions--ridiculously unrealistic), but again, a great reference for *finding* answers.