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
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Server Fault
Q&A for professional system and network administrators
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Drupal Answers
Q&A for Drupal developers and administrators
Ask Different
Q&A for power users of Apple hardware and software
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
User Experience
Q&A for user experience researchers and experts
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Game Development
Q&A for professional and independent game developers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Mathematics
Q&A for people studying math at any level and professionals in related fields
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
LEGO® Answers
Q&A for LEGO® and building block enthusiasts
