Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Server Fault
Q&A for professional system and network administrators
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Sustainable Living
Q&A for folks dedicated to a lifestyle that can be maintained indefinitely without depleting available resources
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Home Improvement
Q&A for contractors and serious DIYers
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Geographic Information Systems
Q&A for cartographers, geographers and GIS professionals
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Game Development
Q&A for professional and independent game developers
Web Applications
Q&A for power users of web applications
Mathematics
Q&A for people studying math at any level and professionals in related fields
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
User Experience
Q&A for user experience researchers and experts
Role-playing Games
Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Ask Patents
Q&A for people interested in improving and participating in the patent system
Cognitive Sciences
Q&A for practitioners, researchers, and students in cognitive science, psychology, neuroscience, and psychiatry
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Salesforce
Q&A for Salesforce administrators, implementation experts, developers and anybody in-between
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Robotics
Q&A for professional robotic engineers, hobbyists, researchers and students
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Software Quality Assurance & Testing
Q&A for software quality control experts, automation engineers, and software testers
Audio-Video Production
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation
Academia
Q&A for academics and those enrolled in higher education
Personal Finance & Money
Q&A for people who want to be financially literate
Personal Productivity
Q&A for people wanting to improve their personal productivity
Computational Science
Q&A for scientists using computers to solve scientific problems
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
The Workplace
Q&A for members of the workforce navigating the professional setting
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Quantitative Finance
Q&A for finance professionals and academics
Cryptography
Q&A for software developers, mathematicians and others interested in cryptography
Computer Science
Q&A for students, researchers and practitioners of computer science
LEGO® Answers
Q&A for LEGO® and building block enthusiasts
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing