| Owncloud | Owncloud | 152 |
| Owncloud | Owncloud Desktop Client | 5 |
| Adam Tomecek | Ownrs | 3 |
| Ownrs | Ownrs | 3 |
| Anteco Visual Technologies | Ownserver | 1 |
| Ben Jeavons | Ownterm | 1 |
| Owndms | Ownticket | 1 |
| Owntone Project | Owntone | 1 |
| Onlinetechtools.com | Owos Lite | 2 |
| Osgeo | Owslib | 1 |
| Ox Project | Ox | 2 |
| Zte | Ox-330p Firmware | 1 |
| Open-xchange | Ox App Suite | 39 |
| Open-xchange | Ox Cloud | 1 |
| Open-xchange | Ox Guard | 10 |
| Gluu | Oxauth | 1 |
| Huawei | Oxfordp-an10b Firmware | 1 |
| Huawei | Oxfordpl-an10b Firmware | 1 |
| Huawei | Oxfords-an00a Firmware | 4 |
| Oxidforge | Oxid Eshop | 3 |
| Oxidforge | Oxid Eshop4.0.0.2 14967 | 1 |
| Oxide Project | Oxide | 5 |
| Ubuntu | Oxide | 5 |
| Monoxide0184 | Oxide Webserver | 1 |
| Ytti | Oxidized Web | 1 |
| Oxwall | Oxwall | 4 |
| Oxyproject | Oxybox | 1 |
| O2php | Oxygen | 3 |
| O2php.com | Oxygen | 3 |
| Soflyy | Oxygen Builder | 1 |
| O2php | Oxygen Bulletin Board | 1 |
| Sync | Oxygen Content Fusion | 1 |
| Sync | Oxygen Publishing Engine | 1 |
| Sync | Oxygen Xml Author | 2 |
| Sync | Oxygen Xml Developer | 2 |
| Sync | Oxygen Xml Editor | 2 |
| Sync | Oxygen Xml Web Author | 1 |
| Sync | Oxygen Xml Webhelp | 1 |
| Oneplus | Oxygenos | 11 |
| Oxynews | Oxynews | 1 |
| Ozeki | Ozeki Ng Sms Gateway | 11 |
| Ozjournals | Ozjournals | 4 |
| Ozone Project | Ozone | 2 |
| Siemens | Ozw672 Firmware | 3 |
| Siemens | Ozw772 Firmware | 3 |
| Indirmax.org | Ozzywork Galeri | 1 |
| Liam Gladdy (Storm Consultancy) | OAuth Twitter Feed For Developers | 1 |
| OVirt | OVirt | 2 |
| OVirt Node | OVirt Node | 1 |
| Fraction | Oasis | 1 |
| Ory | Oathkeeper | 1 |
| Oauth2-proxy | Oauth2-proxy | 2 |
| Thephpleague | Oauth2-server | 1 |
| Jupyterhub | Oauthenticator | 2 |
| Oauthlib | Oauthlib | 1 |
| Mariocasciaro | Object-path | 1 |
| OpenSUSE | Obs-service-set Version | 1 |
| SUSE | Obs-service-source Validator | 1 |
| Opencaching Deutschland | Oc-server3 | 4 |
| Octobercms | October | 25 |
| Octobox | Octobox | 1 |
| Octokit | Octokit.rb | 1 |
| Octokit | Octopoller.rb | 1 |
| Octoprint | Octoprint/octoprint | 8 |
| Cloudflare | Octorpki | 7 |
| Red Hat | Oddjob | 1 |
| N/a | Odh-dashboard | 1 |
| N/a | Odh-notebook-controller-container | 1 |
| Cloudflare | Odoh-rs | 1 |
| Apache | Ofbiz-framework | 1 |
| Offlineimap | Offlineimap | 2 |
| Glidernet | Ogn-live | 1 |
| Ohmyzsh | Ohmyzsh/ohmyzsh | 5 |
| Xwiki-contrib | Oidc | 1 |
| Unspecified | Oils-js | 1 |
| N/a | Okhttp | 1 |
| Omeka | Omeka/omeka-s | 8 |
| Ome | Omero-web | 3 |
| Nhosoya | Omniauth-apple | 1 |
| Auth0 | Omniauth-auth0 | 1 |
| Omniauth-facebook | Omniauth-facebook | 1 |
| Synth | Omniauth-microsoft Graph | 1 |
| Advcomsys.com | OneVote Component For Joomla | 1 |
| Uakfdotb | Oneapp | 1 |
| Theonedev | Onedev | 16 |
| Microsoft | Onefuzz | 1 |
| 1up-lab | Oneup/uploader-bundle | 1 |
| Davidmoreno | Onion | 1 |
| Onionshare | Onionshare | 9 |
| CollaboraOnline | Online | 8 |
| Pallidlight | Online-course-selection-system | 1 |
| Bigprof-software | Online-invoicing-system | 1 |
| PuneethReddyHC | Online-shopping-system-advanced | 1 |
| W3c | Online-spellchecker-py | 1 |
| OpenSeaMap | Online Chart | 1 |
| OpOpenSocialPlugin | OpOpenSocialPlugin | 1 |
| OpWebAPIPlugin | OpWebAPIPlugin | 1 |
| Open-policy-agent | Opa | 2 |
| N/a | Opcua | 1 |
| SUSE | Open Build Service | 5 |
