Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Politics
Q&A for people interested in governments, policies, and political processes
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Stack Overflow
Q&A for professional and enthusiast programmers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Physics
Q&A for active researchers, academics and students of physics
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Ask Patents
Q&A for people interested in improving and participating in the patent system
Mathematics
Q&A for people studying math at any level and professionals in related fields
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Academia
Q&A for academics and those enrolled in higher education
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Ask Different
Q&A for power users of Apple hardware and software
User Experience
Q&A for user experience researchers and experts
Game Development
Q&A for professional and independent game developers
Server Fault
Q&A for professional system and network administrators
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
The Workplace
Q&A for members of the workforce navigating the professional setting