ADnD.com
News roleplay archives, freeform roleplay chat, and resources.
http://www.adnd.com/
Acaeum
Dungeons and dragons rpg collectible database. your source for printing information, cover scans, estimated values, etc for the dungeons and dragons collecting hobby.
http://www.acaeum.com/
Blue Troll's Netbook
Blue Troll's Netbook
http://www.fortunecity.com/victorian/byzantium/55/
Candlekeep
Forgotten realms library
http://www.candlekeep.com/
D&D Online
D&D Online
http://www.ddo-europe.com/
TSR Archive
This site seeks to catalog all of the regular and advanced dungeons & dragons items produced by tsr, complete with pictures.
http://www.flash.net/~brenfrow/index.htm