Stack Overflow
Q&A for professional and enthusiast programmers
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Home Improvement
Q&A for contractors and serious DIYers
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Super User
Q&A for computer enthusiasts and power users
Web Applications
Q&A for power users of web applications
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Server Fault
Q&A for system and network administrators
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
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Ask Ubuntu
Q&A for Ubuntu users and developers