Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
English Language Learners
Q&A for speakers of other languages learning English
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Mathematics
Q&A for people studying math at any level and professionals in related fields
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Computer Science
Q&A for students, researchers and practitioners of computer science
Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation
The Workplace
Q&A for members of the workforce navigating the professional setting
Web Applications
Q&A for power users of web applications
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Server Fault
Q&A for professional system and network administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Game Development
Q&A for professional and independent game developers
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more