Team Artail:Fan art gallery, fan fiction, music, sound clips and information on the games and cartoon.
NeoPortal Sonic: Offers screenshots of the games.
Shadow of a Hedgehog: Images, music, and resources.
Sonic Dream: Contains information, secrets and glitches on Sonic Adventure. Fan art and fiction is also available.
Sonic HQ: Contains information on the games, comics, cartoons, downloads, fan fiction, and music.
Sonic in Gr: Aimed at Greek Sonic players, though information is universal. Includes chat, cheats, and downloads.
Sonic Metropolis: Game secrets, FAQs, music, and message boards.
Sonic Oasis: Offers information, pictures, music, image galleries, and links.
Sonic Online 2: Contains character profiles, history, and sprites.
Sonic the Hedgehog Online Fun and Games: Offers sprites, images, and flash games.
Sonic World: Background information on the games and cartoons. Offers MIDIs, fan art and other creations, and forum.
Sonic X Network: Message board with off-topic, console, and character discussions.
Sonic Zone: Character bios and game data.
Sonicology: Prototypes, hacks, cheats, glitches and zone data.
SonicVerse Team: Online comics, games, art, music, and fan fiction.
Spacecolony ARK: Offers wallpaper, information, and screenshots.
The GHZ: Series history, game zone descriptions and screens, character descriptions and multimedia.
The Sonic Center: Time Attack competitions and information.
The Sonic Foundation: News, information, music, art, and fiction.
The Sonic Shuffle Space: Information on all aspects of the game Sonic Shuffle.
The Sonic Stadium: News, information, forums and chat.