The Conlang Ethnologue is a venerable (if not terribly up to date) database of conlangs created by members of Conlang list. It was compiled by Dan Seriff.
Check out A-M here
and N-Z here.
Conlanging culture: Conlang flag * Conlang terminology * Language Creation Conference
Conlanging organizations: Language Creation Society
Conlanging forums and online communities: Conlang-L FAQ * List of communities * PFJ * Zompist Bulletin Board
Conlanging websites: Cwnc.net
Conlanging games: Conlang relay * Comentary Conlanging * Glossotechnia * #Lexember
Misc: Software tools for conlanging * My First Conlang * St Hildegard's day * *