Stack Overflow
Q&A for professional and enthusiast programmers
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Super User
Q&A for computer enthusiasts and power users
Anime & Manga
Q&A for anime and manga fans
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Seasoned Advice
Q&A for professional and amateur chefs
Code Review
Q&A for peer programmer code reviews
SharePoint
Q&A for SharePoint enthusiasts
Home Improvement
Q&A for contractors and serious DIYers
Information Security
Q&A for information security professionals
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Skeptics
Q&A for scientific skepticism
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
Mathematics
Q&A for people studying math at any level and professionals in related fields
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Server Fault
Q&A for system and network administrators
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Physics
Q&A for active researchers, academics and students of physics