Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Stack Overflow
Q&A for professional and enthusiast programmers
Physics
Q&A for active researchers, academics and students of physics
Drones and Model Aircraft
Q&A for experienced flyers, pilots, and builders of drones and model aircraft
3D Printing
Q&A for 3D printing enthusiasts
Area 51
Q&A for proposing new sites in the Stack Exchange network
English Language Learners
Q&A for speakers of other languages learning English
Home Improvement
Q&A for contractors and serious DIYers
Travel
Q&A for road warriors and seasoned travelers
Law
Q&A for legal professionals, students, and others with experience or interest in law
Politics
Q&A for people interested in governments, policies, and political processes
Super User
Q&A for computer enthusiasts and power users
Personal Finance & Money
Q&A for people who want to be financially literate
Engineering
Q&A for professionals and students of engineering
Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Retrocomputing
Q&A for vintage-computer hobbyists interested in restoring, preserving, and using the classic computer and gaming systems of yesteryear
Woodworking
Q&A for professional and amateur woodworkers
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
The Workplace
Q&A for members of the workforce navigating the professional setting
Information Security
Q&A for information security professionals
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts