I'd like to describe myself as an adventurer who seeks to explore new knowledge. But actually, I'm just an ordinary people, struggling hard to make the life a little better.
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
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
User Experience
Q&A for user experience researchers and experts
Mathematics
Q&A for people studying math at any level and professionals in related fields
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
WordPress Answers
Q&A for WordPress developers and administrators
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Server Fault
Q&A for professional system and network administrators
Photography
Q&A for professional, enthusiast and amateur photographers
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
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
Personal Finance & Money
Q&A for people who want to be financially literate
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers