Puzzling
Q&A for those who create, solve, and study puzzles
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
English Language Learners
Q&A for speakers of other languages learning English
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Mathematics
Q&A for people studying math at any level and professionals in related fields
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Stack Overflow
Q&A for professional and enthusiast programmers
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
The Workplace
Q&A for members of the workforce navigating the professional setting
Politics
Q&A for people interested in governments, policies, and political processes
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts