Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Game Development
Q&A for professional and independent game developers
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Mathematics
Q&A for people studying math at any level and professionals in related fields
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
User Experience
Q&A for user experience researchers and experts
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Server Fault
Q&A for professional system and network administrators
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Photography
Q&A for professional, enthusiast and amateur photographers
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Biology
Q&A for biology researchers, academics, and students
Sports
Q&A for participants in team and individual sport activities
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation