Physics
Q&A for active researchers, academics and students of physics
Stack Overflow
Q&A for professional and enthusiast programmers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Law
Q&A for legal professionals, students, and others with experience or interest in law
Information Security
Q&A for information security professionals
The Great Outdoors
Q&A for people who love being outdoors enjoying nature and wilderness, and learning about the required skills and equipment
Monero
Q&A for developers and users of the secure, private and untraceable cryptocurrency Monero
Super User
Q&A for computer enthusiasts and power users
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Artificial Intelligence
Q&A for people interested in conceptual questions about life and challenges in a world where "cognitive" functions can be mimicked in purely digital environment
Politics
Q&A for people interested in governments, policies, and political processes
Area 51
Q&A for proposing new sites in the Stack Exchange network
Server Fault
Q&A for system and network administrators
Vi and Vim
Q&A for people using the vi and Vim families of text editors
User Experience
Q&A for user experience researchers and experts
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Travel
Q&A for road warriors and seasoned travelers
English Language Learners
Q&A for speakers of other languages learning English
Web Applications
Q&A for power users of web applications
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Arts & Crafts
Q&A for artists and crafters
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Ask Different
Q&A for power users of Apple hardware and software
Tor
Q&A for researchers, developers, and users of Tor
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Open Source
Q&A for people organizing, marketing or licensing open source development projects
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Data Science
Q&A for Data science professionals, Machine Learning specialists, and those interested in learning more about the field
MathOverflow
Q&A for professional mathematicians
Engineering
Q&A for professionals and students of engineering
Game Development
Q&A for professional and independent game developers
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Arduino
Q&A for developers of open-source hardware and software that is compatible with Arduino
Video Production
Q&A for engineers, producers, editors and enthusiasts spanning the fields of video and media creation
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Ask Ubuntu
Q&A for Ubuntu users and developers
The Workplace
Q&A for members of the workforce navigating the professional setting
Photography
Q&A for professional, enthusiast and amateur photographers
Puzzling
Q&A for those who create, solve, and study puzzles