Emacs
Q&A for those using, extending or developing Emacs
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Stack Overflow
Q&A for professional and enthusiast programmers
Ask Different
Q&A for power users of Apple hardware and software
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
German Language
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Super User
Q&A for computer enthusiasts and power users
Computer Science
Q&A for students, researchers and practitioners of computer science
Mathematics
Q&A for people studying math at any level and professionals in related fields
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Home Improvement
Q&A for contractors and serious DIYers
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
ExpressionEngine® Answers
Q&A for administrators, end users, developers and designers for ExpressionEngine® CMS
Server Fault
Q&A for system and network administrators