Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Puzzling
Q&A for those who create, solve, and study puzzles
Stack Overflow
Q&A for professional and enthusiast programmers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Coffee
Q&A for people interested in all aspects of producing and consuming coffee
Arqade
Q&A for passionate videogamers on all platforms
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Code Review
Q&A for peer programmer code reviews
Server Fault
Q&A for system and network administrators
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Super User
Q&A for computer enthusiasts and power users