Stack Overflow
Q&A for professional and enthusiast programmers
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
History
Q&A for historians and history buffs
Movies & TV
Q&A for movie and TV enthusiasts
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Software Recommendations
Q&A for people seeking specific software recommendations
Politics
Q&A for people interested in governments, policies, and political processes
Mathematics
Q&A for people studying math at any level and professionals in related fields
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Retrocomputing
Q&A for vintage-computer hobbyists interested in restoring, preserving, and using the classic computer and gaming systems of yesteryear
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Personal Finance & Money
Q&A for people who want to be financially literate
Quantitative Finance
Q&A for finance professionals and academics
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Bioinformatics
Q&A for researchers, developers, students, teachers, and end users interested in bioinformatics
Pets
Q&A for pet owners, caretakers, breeders, veterinarians, and trainers
Computer Science Educators
Q&A for those involved in the field of teaching Computer Science
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Academia
Q&A for academics and those enrolled in higher education
Game Development
Q&A for professional and independent game developers
Ethereum
Q&A for users of Ethereum, the decentralized application platform and smart contract enabled blockchain
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Skeptics
Q&A for scientific skepticism
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
The Workplace
Q&A for members of the workforce navigating the professional setting
Home Improvement
Q&A for contractors and serious DIYers
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Physics
Q&A for active researchers, academics and students of physics
Travel
Q&A for road warriors and seasoned travelers
Sports
Q&A for participants in team and individual sport activities
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills