Some tasty things..
Q&A for professional and enthusiast programmers
Q&A for Ubuntu users and developers
Q&A for system and network administrators
Q&A for pro webmasters
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for professional programmers interested in conceptual questions about software development
Q&A for computer enthusiasts and power users
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for database professionals who wish to improve their database skills and learn from others in the community