Pets
Q&A for pet owners, caretakers, breeders, veterinarians, and trainers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Stack Overflow
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Travel
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Physical Fitness
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Medical Sciences
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Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
TeX - LaTeX
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Electrical Engineering
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Physics
Q&A for active researchers, academics and students of physics
Worldbuilding
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Board & Card Games
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Sports
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Coffee
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Biology
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Academia
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Home Improvement
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Politics
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German Language
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Law
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Internet of Things
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Role-playing Games
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Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
MathOverflow
Q&A for professional mathematicians
Puzzling
Q&A for those who create, solve, and study puzzles
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Anime & Manga
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Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Arqade
Q&A for passionate videogamers on all platforms
Super User
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Area 51
Q&A for proposing new sites in the Stack Exchange network