Adventure

Colossal Cave Adventure Forum
A place to discuss the Crowther and Woods "Adventure" game in all its various versions.
http://forums.about.com/xyzzy

Colossal Cave Mazes
A homage to some of the more treacherous trails the Colossal Cave contained.
http://www.quietfire.com/maze/

Delphi: Colossal Cave Adventure forum
Forum for discussion of Adventure in its various forms.
http://forums.delphiforums.com/xyzzy/start/

Gamez.com: Colossal Cave
Gamez.com's collection of Colossal Cave cheats and solutions.
http://gamez.com/games/pc/colossalcave.html

Matthew Murray's Review
Capsule review. "Adventure is worth playing today for the nostalgia and for the fact that well-designed games never do go out of style."
http://www.matthewmurray.net/Reviews/ComputerGames/Adventure.html

Mipmip
Mike Arnautov's site includes a humor section, downloads of A-code implementations of some Adventure versions, as well as various personal works.
http://www.mipmip.org/

Prof. Dennis G. Jerz: Colossal Cave Adventure
About the history of the game and examples from some different versions.
http://jerz.setonhill.edu/if/canon/Adventure.htm

David Tanguay's Review
Rated -2 on -5 to +5 scale. "If there was a good story to go with it, the first adventure game would have also been one of the best." <small>(January 1, 1995)</small>
http://www.sentex.net/~datanguayh/games/adventure_rev.html