Cerebral Cortex 314

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

The Commander Keen Web Page

Offers cheats, hints, pictures, downloads, and guestbook.
http://www.angelfire.com/hi5/justinj88/

pocket.ign.com: Keen!

Offers rumours about a possible version of Id Software's Commander Keen game for the Game Boy Color.
http://pocket.ign.com/articles/082/082671p1.html

3D Realms: A Look Back at Commander Keen

The history of Commander Keen, includes photos, and screenshots.
http://www.3drealms.com/keenhistory/

Justin's Really Keen Page

Includes downloads and a list of where all the 1UPs in the games can be found.
http://gothmog.homeip.net:8000/keen/

S&F Prod

Cheats, sounds, links, and downloads.
http://www.student.tue.nl/u/a.f.smeijers/sfp/fram/ckeen.htm

Commander Keen Fan Site

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

GameSpot

Frank Provo reviews the Game Boy Color version. Includes screen shots and passwords. Score: 6.8 out of 10.
http://www.gamespot.com/gbc/action/commanderkeen/

Keen Galaxy

Offers downloads, online games, episode guide, music, cheat codes, maps, and installation guide.
http://www.keengalaxy.com/