Let's try to share the bits of knowledge gained during those innumerable hours of programming... Nowadays I use mostly PostgreSQL, C++/Qt, Perl, php on Unix servers.
Q&A for professional and enthusiast programmers
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Q&A for system and network administrators
Q&A for computer enthusiasts and power users
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Q&A for Ubuntu users and developers
Q&A for Drupal developers and administrators
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for students, teachers, and linguists wanting to discuss the finer points of the French language