Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Photography
Q&A for professional, enthusiast and amateur photographers
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Russian Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Russian language
Physics
Q&A for active researchers, academics and students of physics
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Biology
Q&A for biology researchers, academics, and students
Mathematics
Q&A for people studying math at any level and professionals in related fields
Game Development
Q&A for professional and independent game developers
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
User Experience
Q&A for user experience researchers and experts
Ask Different
Q&A for power users of Apple hardware and software
Computer Science
Q&A for students, researchers and practitioners of computer science
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
The Workplace
Q&A for members of the workforce navigating the professional setting
Computational Science
Q&A for scientists using computers to solve scientific problems
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Server Fault
Q&A for professional system and network administrators