Google Groups - rec.games.hack
Threaded archive of Usenet posts. (Discontinued September 1994)
Hack 1.0.3
Original source distribution with release commentary and history.
Hack and NetHack
Feature list, development history, and links to resources.
PaleoHack
Palm OS port. Changelog, play guide, source and executable files, and build instructions.
RevivedHack
Adaptation of PC Hack 3.61 to Windows. Background, screenshot, and executable.