Puzzling
Q&A for those who create, solve, and study puzzles
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
Q&A for professional and enthusiast programmers
Academia
Q&A for academics and those enrolled in higher education
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Ask Different
Q&A for power users of Apple hardware and software
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Movies & TV
Q&A for movie and TV enthusiasts
Bioinformatics
Q&A for researchers, developers, students, teachers, and end users interested in bioinformatics