PhD, SRE@Google, computer enthusiast, usually half-drunk, friendly and pernickety.
Stack Overflow
Q&A for professional and enthusiast programmers
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Programmers
Q&A for professional programmers interested in conceptual questions about software development
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Signal Processing
Q&A for practitioners of the art and science of signal, image and video processing
Server Fault
Q&A for professional system and network administrators
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
Physics
Q&A for active researchers, academics and students of physics
Photography
Q&A for professional, enthusiast and amateur photographers
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Writers
Q&A for authors, editors, reviewers, professional writers, and aspiring writers