Japanese Language
Q&A for students, teachers, and linguists wanting to discuss the finer points of the Japanese language
English Language Learners
Q&A for speakers of other languages learning English
Stack Overflow
Q&A for professional and enthusiast programmers
Information Security
Q&A for information security professionals
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Ask Different
Q&A for power users of Apple hardware and software
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Ask Ubuntu
Q&A for Ubuntu users and developers
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Linguistics
Q&A for professional linguists and others with an interest in linguistic research and theory
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Gardening & Landscaping
Q&A for gardeners and landscapers
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Expatriates
Q&A for people living abroad on a long-term basis
Super User
Q&A for computer enthusiasts and power users