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.
Chinese Language & Usage
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Chinese language
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
WordPress Answers
Q&A for WordPress developers and administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Salesforce
Q&A for Salesforce administrators, implementation experts, developers and anybody in-between
