Commander Keen Series

Beyond the Pogo
Offers fan art, newsletter, encyclopedia, and editing tools.
http://spatang.com/ck/

Can't Get Enough Commander Keen
Including character lists, cheats, and hints.
http://www.al-morrin.co.uk/samira/keen/index.php

Cerebral Cortex 314
Information, screen shots, downloads, an ASCII art section, level editor, and level sets for Keen 1.
http://www.classicgaming.com/cc314/

Commander Keen Fan Site
Includes information, screenshots, downloads, cheats and links.
http://www.commander-keen.com/

The Commander Keen Web Page
Offers cheats, hints, pictures, downloads, and guestbook.
http://www.angelfire.com/hi5/justinj88/

The Commander Keen Wiki
Fan-maintained reference to the entire Commander Keen universe, including mods and fan made games.
http://www.shikadi.net/keenwiki/

3D Realms: A Look Back at Commander Keen
The history of Commander Keen, includes photos, and screenshots.
http://www.3drealms.com/keenhistory/

GameSpot
Frank Provo reviews the Game Boy Color version. Includes screen shots and passwords. Score: 6.8 out of 10. <small>(June 12, 2001)</small>
http://www.gamespot.com/gbc/action/commanderkeen/

pocket.ign.com: Keen!
Offers rumours about a possible version of Id Software's Commander Keen game for the Game Boy Color. <small>(July 26, 2000)</small>
http://pocket.ign.com/articles/082/082671p1.html