PHP

I just finished my presentation on PHP at the London, Ontario Podcamp 2010. There's probably not much here for seasoned PHP hands, it's oriented towards someone who wants a basic introduction, especially oriented towards theming a content management system. If you're just getting started and have a question, be sure to put your PHP question in the comments below and I'll do my best to help you out.

Webmasters by Design posted a roundup of the best developer cheat sheets around. Handy reference, but please think twice before killing trees.