Programmers
Q&A for professional programmers interested in conceptual questions about software development
Physical Fitness
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Personal Productivity
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Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
User Experience
Q&A for user experience researchers and experts
Personal Finance & Money
Q&A for people who want to be financially literate
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Musical Practice & Performance
Q&A for musicians, students, and enthusiasts
Ask Different
Q&A for power users of Apple hardware and software
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Server Fault
Q&A for professional system and network administrators
Graphic Design
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Sustainable Living
Q&A for folks dedicated to a lifestyle that can be maintained indefinitely without depleting available resources
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system