TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Physics
Q&A for active researchers, academics and students of physics
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Mathematics
Q&A for people studying math at any level and professionals in related fields
Game Development
Q&A for professional and independent game developers
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Server Fault
Q&A for professional system and network administrators
Chemistry
Q&A for scientists, academics, teachers and students
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Personal Productivity
Q&A for people wanting to improve their personal productivity