Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
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
Stack Overflow
Q&A for professional and enthusiast programmers
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Academia
Q&A for academics and those enrolled in higher education
Mathematics
Q&A for people studying math at any level and professionals in related fields
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
WordPress Answers
Q&A for WordPress developers and administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
The Workplace
Q&A for members of the workforce navigating the professional setting
Computer Science
Q&A for students, researchers and practitioners of computer science
Computational Science
Q&A for scientists using computers to solve scientific problems