NetHack

JNetHack
Version 3.2.2, Japanized. Features a new class, source, and executables.
http://www.jnethack.org/

The NetHack Dungeon
Hall of fame, tips and tricks, spoilers, and other files for the 3.2 release.
http://home.swipnet.se/~w-73296/

The NetHack Home Page
Unofficial mirror site. Spoilers, source, executables, and utilities.
http://roguelikes.sauceforge.net/pub/nethack/

The NetHack Index
Annotated directory of spoilers, variants, patches, utilities, servers, reviews, and other useful information.
http://www.nicolaas.net/erebus/

NetHack Stuff
Dictionary, world map, and play statistics.
http://www.nethack.net/

rec.games.roguelike.nethack Cretins Advisory
Dedicated to keeping the newsgroup clean of "spammers, d00dz and things like" that.
http://www.beastwithin.org/users/wwwwolf/games/nethack/

rec.games.roguelike.nethack FAQ
Frequently asked questions about the game, its Usenet newsgroup, and related topics.
http://www.spod-central.org/~psmith/nh/rgrn-FAQ.txt

Sascha's and Ralph's NetHack site
Includes spoilers, hints, utility programs, and a list of public NetHack servers
http://www.nethack.de/

Yahoo! Groups - thenethacklair
Gameplay discussion group. Free membership required to participate.
http://games.groups.yahoo.com/group/thenethacklair/