Physics
Q&A for active researchers, academics and students of physics
Academia
Q&A for academics and those enrolled in higher education
Puzzling
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Biology
Q&A for biology researchers, academics, and students
Expatriates
Q&A for people living abroad on a long-term basis
Stack Overflow
Q&A for professional and enthusiast programmers
Super User
Q&A for computer enthusiasts and power users
Skeptics
Q&A for scientific skepticism
Engineering
Q&A for professionals and students of engineering
Psychology & Neuroscience
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Lifehacks
Q&A for people looking to bypass life's everyday problems with simple tricks
Area 51
Q&A for proposing new sites in the Stack Exchange network
Law
Q&A for legal professionals, students, and others with experience or interest in law
Ask Ubuntu
Q&A for Ubuntu users and developers
Mathematics
Q&A for people studying math at any level and professionals in related fields
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Chemistry
Q&A for scientists, academics, teachers, and students in the field of chemistry
Photography
Q&A for professional, enthusiast and amateur photographers
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
The Workplace
Q&A for members of the workforce navigating the professional setting
Cross Validated
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Information Security
Q&A for information security professionals
Stack Overflow em Português
Perguntas e respostas para programadores profissionais e entusiastas
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Politics
Q&A for people interested in governments, policies, and political processes
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Home Improvement
Q&A for contractors and serious DIYers
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Software Engineering
Q&A for professionals, academics, and students working within the systems development life cycle
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Seasoned Advice
Q&A for professional and amateur chefs
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Portuguese Language
Q&A for linguists, teachers and learners wanting to discuss the finer points of the Portuguese language
English Language Learners
Q&A for speakers of other languages learning English
Bitcoin
Q&A for Bitcoin users, developers, and enthusiasts
Web Applications
Q&A for power users of web applications
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Server Fault
Q&A for system and network administrators
Travel
Q&A for road warriors and seasoned travelers
The Great Outdoors
Q&A for people who love being outdoors enjoying nature and wilderness, and learning about the required skills and equipment
Homebrewing
Q&A for dedicated home brewers and serious enthusiasts
Board & Card Games
Q&A for people who like playing board games, designing board games or modifying the rules of existing board games
Interpersonal Skills
Q&A for people looking to improve their interpersonal communication skills