TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Photography
Q&A for professional, enthusiast and amateur photographers
Server Fault
Q&A for professional system and network administrators
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
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
Computational Science
Q&A for scientists using computers to solve scientific problems