Websites that I actively develop / write for:
At Wit's End Comics
"Build a man a fire and you've warmed him for a night. Set a man on fire and you've warmed him for the rest of his life."
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Stack Overflow
Q&A for professional and enthusiast programmers
Arqade
Q&A for passionate videogamers on all platforms
Martial Arts
Q&A for students and teachers of all martial arts
Server Fault
Q&A for system and network administrators
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Seasoned Advice
Q&A for professional and amateur chefs
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Japanese Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
Area 51
Q&A for proposing new sites in the Stack Exchange network
Music Fans
Q&A for music historians, critics, and fans
Literature
Q&A for scholars and enthusiasts of literature
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Home Improvement
Q&A for contractors and serious DIYers
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Skeptics
Q&A for scientific skepticism
Physics
Q&A for active researchers, academics and students of physics
Sports
Q&A for participants in team and individual sport activities
Travel
Q&A for road warriors and seasoned travelers
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Photography
Q&A for professional, enthusiast and amateur photographers
French Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Game Development
Q&A for professional and independent game developers
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle