Personal Productivity
Q&A for people wanting to improve their personal productivity
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Christianity
Q&A for committed Christians, experts in Christianity and those interested in learning more
Politics
Q&A for people interested in governments, policies, and political processes
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
User Experience
Q&A for user experience researchers and experts
Physics
Q&A for active researchers, academics and students of physics
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Mathematics
Q&A for people studying math at any level and professionals in related fields
Server Fault
Q&A for professional system and network administrators
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role
Answers OnStartups
Q&A for entrepreneurs looking to start or run a new business
Windows Phone
Q&A for enthusiasts and power users of Windows Phone OS
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Academia
Q&A for academics and those enrolled in higher education
Personal Finance & Money
Q&A for people who want to be financially literate
Physical Fitness
Q&A for physical fitness professionals, athletes, trainers, and those providing health-related needs
Ask Different
Q&A for power users of Apple hardware and software
WordPress Answers
Q&A for WordPress developers and administrators