Hamtaro
Official site, with character profiles, glossary, song lyrics, and episode summaries.

Hamtaro: We Love the Ham-Hams
Character guide, image gallery, fan art, and links.

Hamtaro Planet
Image gallery, character information, adoptions, and fan art.

Hamtaro World
Character images and video files.

Hamtaro: Yay for Adventure Hamsters
Character profiles and images, movie information, fan art, and cast list.

Kawaii Tottoko Hamutaro
Morning Musume Ham-Hams, fan art, fan fiction, and merchandise scans.

Hamtaro's Dream World
Characters, adoption center, MIDI files, quiz, and wallpaper.

Ch-eah-lee Muffin's Hamtaro Site
Character profiles and images, animated GIFs, and song lyrics.

Cappy-time
Shrine to Cappy, with image gallery, profile, and bookmarks.

Ham-ham Kingdom
Episode guide, screenshots, character profiles, song downloads, wallpaper, sheet music, and movie and game information.

The Sunflower Field
Images, game sprites, and character profiles.