Mathematics
Q&A for people studying math at any level and professionals in related fields
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Server Fault
Q&A for professional system and network administrators
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
WordPress Answers
Q&A for WordPress developers and administrators
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
The Great Outdoors
Q&A for people who love outdoor activities, excursions, and outdoorsmanship
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
