Anime Lyrics: Um Jammer Lammy lyrics: Lyrics from the "Make it Sweet!" album, most of which come from the game itself.
Elfwood FanQuarter: fan art by Sarah Guilbeaux: Um Jammer Lammy fan art drawn by Sarah Guilbeaux. Mostly pictures of Teriyaki Ono, with a few of Lammy, Rammy and Parappa.
Level 80: Contains various hints for the game.
Neoseeker's Um Jammer Lammy Resources: Offers FAQs, screenshots, a discussion board, and links to reviews.
Um Jammer Lammy: Official Sony of America page. Flash-based site with character biographies, screenshots and an overview of how the game works.
Whimsyload: Artwork by game artist Rodney Alan Greenblat