I specialize in Django & PostgreSQL. I'm self taught and most of my knowledge comes from places like Stackoverflow and Serverfault.
Q&A for professional and enthusiast programmers
Q&A for professional programmers interested in conceptual questions about software development
Q&A for professional system and network administrators
Q&A for Information security professionals
Q&A for Ubuntu users and developers
Q&A for professional graphic designers and non-designers trying to do their own graphic design
Q&A for database professionals who wish to improve their database skills and learn from others in the community