Mathematics
Q&A for people studying math at any level and professionals in related fields
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Server Fault
Q&A for professional system and network administrators
Quantitative Finance
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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
Computational Science
Q&A for scientists using computers to solve scientific problems
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
