Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Personal Finance & Money
Q&A for people who want to be financially literate
Server Fault
Q&A for professional system and network administrators
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
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
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
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
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
User Experience
Q&A for user experience researchers and experts
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
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
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Sports
Q&A for participants in team and individual sport activities
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Computer Science
Q&A for students, researchers and practitioners of computer science