Stack Overflow
Q&A for professional and enthusiast programmers
Server Fault
Q&A for professional system and network administrators
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
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
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
