| 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. |
Classical
