Stack Overflow
Q&A for professional and enthusiast programmers
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Astronomy
Q&A for astronomers and astrophysicists
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Video Production
Q&A for engineers, producers, editors and enthusiasts spanning the fields of video and media creation
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Photography
Q&A for professional, enthusiast and amateur photographers