Stack Overflow
Q&A for professional and enthusiast programmers
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Graphic Design
Q&A for Graphic Design professionals, students, and enthusiasts
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Physics
Q&A for active researchers, academics and students of physics
Worldbuilding
Q&A for writers/artists using science, geography and culture to construct imaginary worlds and settings
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Philosophy
Q&A for those interested in the study of the fundamental nature of knowledge, reality, and existence
Politics
Q&A for people interested in governments, policies, and political processes
Software Recommendations
Q&A for people seeking specific software recommendations
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi