Anime News Network - Tenchi Muyo! Ryo-Ohki (OAV): ANN Encyclopedia page with series information, user ratings and feedback, related series information, related releases, news updates, and links.
muyo.org: A Tenchi Muyo! Fan Site: Includes wallpapers, MP3s, fan fiction, links, and forums.
Tenchi Muyo: Official site by Pioneer Entertainment. Episode synopses, character profiles, merchandise, and games.
Tenchi Muyo! GXP: Official site for GXP series with series info, story, character info, and media.
Tenchi Roleplaying Game: Features rules and advice on how to play Tenchi on AOL chat rooms.