Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Personal Finance & Money
Q&A for people who want to be financially literate
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
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
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Ask Different
Q&A for power users of Apple hardware and software
Server Fault
Q&A for professional system and network administrators
Game Development
Q&A for professional and independent game developers
