I'm a freelance web developer, specializing in PHP, MySQL and Javascript. Stackoverflow.com is my favorite when it comes to getting help or contributing my knowledge to the global developer community.
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Ask Different
Q&A for power users of Apple hardware and software
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Server Fault
Q&A for professional system and network administrators
Drupal Answers
Q&A for Drupal developers and administrators
WordPress Answers
Q&A for WordPress developers and administrators
Photography
Q&A for professional, enthusiast and amateur photographers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
