General:
Category City -- cities that have some relevance to programming
Category Collaboration -- ways for people to work together
Category Country -- direct links to pages about various countries
Category External Link -- pages mainly for non-wiki-wiki links
Category Magazine -- paper and electronic magazines
Category Maintenance -- maintenance, all kinds
Category Reference -- reference works
Category Table -- tables of useful information
Category Rant -- Discussions of pros and cons taken to some extremes. Usually entertaining, but ultimately tiring to the uninitiated.