Name  | Board Account | Group | Docs | Utils | Trans | Hacks | Language |
|---|---|---|---|---|---|---|---|
| Operation Decoded | - | Yes | No | No | Yes | No | English |
| opera.maniac | opera.maniac | No | No | No | No | No | Indonesian |
| Open! Ponkikki | - | No | No | No | Yes | No | English |
| oostyx | - | No | Yes | Yes | No | No | English |
| Oosran | - | No | No | No | No | No | English |
| Oondipoondi | Oondipoondi | No | No | No | No | Yes | English |
| Oogami | - | No | No | No | No | No | English |
| Oocities | Oocities | No | No | No | No | Yes | English |
| OnyxFusionHacks | OnyxFusionHacks | No | No | No | No | Yes | English |
| ONLYUSEmeFEET | ONLYUSEmeFEET | No | No | No | No | Yes | English |
| OnlineVideoSurfer | - | No | No | No | No | Yes | English |
| Onkeikun | - | No | No | No | No | No | English |
| onionzoo | - | No | No | No | Yes | No | English |
| Onion Knight BR | Onion Knight BR | No | No | No | No | Yes | Portuguese |
| OneVurfedGwrx | - | No | No | No | No | No | English |
| OneTrueEmiya | - | No | No | No | No | No | English |
| Onepiecefreak | - | No | No | No | No | No | English |
| OneOf99 | OneOf99 | No | No | No | No | Yes | English |
| onefineday | one1fineday | No | No | No | No | Yes | English |
| OMorty | - | No | No | No | No | No | English |
