Ask Different
Q&A for power users of Apple hardware and software
Super User
Q&A for computer enthusiasts and power users
Blender
Q&A for people who use Blender to create 3D graphics, animations, or games
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Information Security
Q&A for information security professionals
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Web Applications
Q&A for power users of web applications
Academia
Q&A for academics and those enrolled in higher education
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Skeptics
Q&A for scientific skepticism
Politics
Q&A for people interested in governments, policies, and political processes
Stack Overflow
Q&A for professional and enthusiast programmers
User Experience
Q&A for user experience researchers and experts