Happy and avid IT professional
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Programmers
Q&A for professional programmers interested in conceptual questions about software development
French Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
German Language & Usage
Q&A for speakers of German wanting to discuss the finer points of the language and translation
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
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
Japanese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
LEGO® Answers
Q&A for LEGO® and building block enthusiasts
Server Fault
Q&A for professional system and network administrators
Mathematics
Q&A for people studying math at any level and professionals in related fields
Physics
Q&A for active researchers, academics and students of physics
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Ask Different
Q&A for power users of Apple hardware and software
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Ask Patents
Q&A for people interested in improving and participating in the patent system
Spanish Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Spanish language