Stack Overflow
Q&A for professional and enthusiast programmers
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
SharePoint
Q&A for SharePoint enthusiasts
Super User
Q&A for computer enthusiasts and power users
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Web Applications
Q&A for power users of web applications
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Arqade
Q&A for passionate videogamers on all platforms
Server Fault
Q&A for system and network administrators