Server Fault
Q&A for professional system and network administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Mathematics
Q&A for people studying math at any level and professionals in related fields
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Game Development
Q&A for professional and independent game developers
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Personal Productivity
Q&A for people wanting to improve their personal productivity
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Academia
Q&A for academics and those enrolled in higher education
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Computer Science
Q&A for students, researchers and practitioners of computer science
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Physics
Q&A for active researchers, academics and students of physics
