Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Ask Different
Q&A for power users of Apple hardware and software
Server Fault
Q&A for professional system and network administrators
Homebrewing
Q&A for dedicated home brewers and serious enthusiasts
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
WordPress Answers
Q&A for WordPress developers and administrators
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Physics
Q&A for active researchers, academics and students of physics
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
User Experience
Q&A for user experience researchers and experts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Game Development
Q&A for professional and independent game developers
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games