Game Development ♦
Q&A for professional and independent game developers
Ask Different
Q&A for power users of Apple hardware and software
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Server Fault
Q&A for professional system and network administrators
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Personal Finance & Money
Q&A for people who want to be financially literate
Mathematics
Q&A for people studying math at any level and professionals in related fields
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
User Experience
Q&A for user experience researchers and experts
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Physics
Q&A for active researchers, academics and students of physics
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Photography
Q&A for professional, enthusiast and amateur photographers
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design