English Language & Usage
Q&A for linguists, etymologists, and serious English language 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
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Physics
Q&A for active researchers, academics and students of physics
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Personal Productivity
Q&A for people wanting to improve their personal productivity
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Mathematics
Q&A for people studying math at any level and professionals in related fields
Electrical Engineering
Q&A for electronics and electrical engineering professionals, 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
Game Development
Q&A for professional and independent game developers
Photography
Q&A for professional, enthusiast and amateur photographers
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
The Workplace
Q&A for members of the workforce navigating the professional setting
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Computer Science
Q&A for students, researchers and practitioners of computer science
Salesforce
Q&A for Salesforce administrators, implementation experts, developers and anybody in-between
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Server Fault
Q&A for professional system and network administrators