Mathematics
Q&A for people studying math at any level and professionals in related fields
English Language Learners
Q&A for speakers of other languages learning English
Stack Overflow
Q&A for professional and enthusiast programmers
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
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
Music: Practice & Theory
Q&A for musicians, students, and enthusiasts
The Workplace
Q&A for members of the workforce navigating the professional setting
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Bricks
Q&A for LEGO® and building block enthusiasts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Computer Science
Q&A for students, researchers and practitioners of computer science
Literature
Q&A for scholars and enthusiasts of literature
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Puzzling
Q&A for those who create, solve, and study puzzles
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts