Hack and NetHack

Feature list, development history, and links to resources.
http://www.hut.fi/~eye/roguelike/nethack.html

Google Groups - rec.games.hack

Threaded archive of Usenet posts. (Discontinued September 1994)
http://groups.google.com/groups?group=rec.games.hack&start=88

PaleoHack

Palm OS port. Changelog, play guide, source and executable files, and build instructions.
http://paleohack.berlios.de/

Hack 1.0.3

Original source distribution with release commentary and history.
http://homepages.cwi.nl/~aeb/games/hack/hack.html

RevivedHack

Adaptation of PC Hack 3.61 to Windows. Background, screenshot, and executable.
http://www.freewebs.com/drussell/RevivedHack.htm