Turning my hobby into my profession since 1994.
Main expertise: SQL, C#.
Stack Overflow
Q&A for professional and enthusiast programmers
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Super User
Q&A for computer enthusiasts and power users
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
Server Fault
Q&A for system and network administrators
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
User Experience
Q&A for user experience researchers and experts
Code Review
Q&A for peer programmer code reviews
Software Recommendations
Q&A for people seeking specific software recommendations
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Area 51
Q&A for proposing new sites in the Stack Exchange network