| Openbsd | Openbsd | 28 |
| Emerson | Openbsi | 2 |
| Openca | Openca | 3 |
| Openca | Openca Pki | 1 |
| Hpe | Opencall Media Platform | 1 |
| Opencart | Opencart | 12 |
| Simple Machines | Opencart | 24 |
| Villagedefrance | Opencart-overclocked | 1 |
| Apereo | Opencast | 3 |
| Opencast | Opencast | 3 |
| Openmairie | Opencatalogue | 2 |
| Opencats | Opencats | 21 |
| Openchrome | Openchrome | 1 |
| Openci | Openci | 1 |
| Openmairie | Opencimetiere | 1 |
| Openclinic Project | Openclinic | 1 |
| Openclinic Ga Project | Openclinic Ga | 26 |
| Alkacon | Opencms | 8 |
| Alkacon | Opencms Apollo Template | 3 |
| Openmairie | Opencominterne | 2 |
| Openconext | Openconext Engineblock | 1 |
| Zakon Group | Openconf | 2 |
| Zakongroup | Openconf | 1 |
| Infradead | Openconnect | 4 |
| Openconstructor Project | Openconstructor | 4 |
| Android | Opencore | 1 |
| Openmairie | Opencourrier | 3 |
| Opencrx | Opencrx | 10 |
| Opencryptoki Project | Opencryptoki | 3 |
| Citeum | Opencti | 2 |
| Opencv | Opencv | 30 |
| Codingforentrepreneurs | Opencv Rest Api | 1 |
| We-com | Opendata Cms | 1 |
| Linuxfoundation | Opendaylight | 5 |
| Opendaylight | Opendaylight | 11 |
| Opendb | Opendb | 3 |
| Opendental | Opendental | 0 |
| Opendetex Project | Opendetex | 0 |
| Cmu | Opendiamond | 1 |
| Opendkim | Opendkim | 1 |
| Trusteddomain | Opendmarc | 5 |
| Opendoas Project | Opendoas | 1 |
| Opendocman | Opendocman | 10 |
| Dreambox | Opendreambox | 1 |
| Openeclass | Openeclass | 2 |
| Ronomon | Opened | 1 |
| Progress | Openedge | 3 |
| Progress | Openedge Explorer | 1 |
| Progress | Openedge Management | 1 |
| Openedit Inc | Openedit | 1 |
| Openedit | Openedit Digital Asset Management | 3 |
| Openelec | Openelec | 1 |
| Open-emr | Openemr | 82 |
| Openemr | Openemr | 93 |
| Openengine | Openengine | 4 |
| Opener Project | Opener | 2 |
| Huawei | Openeuler | 5 |
| Openatom | Openeuler Kernel | 1 |
| Openevidence | Openevidence | 2 |
| Openexif Project | Openexif | 5 |
| Ilm | Openexr | 40 |
| Openexr | Openexr | 22 |
| Apperta | Openeye | 1 |
| Apperta | Openeyes | 1 |
| Openfaq | Openfaq | 1 |
| Openfiler | Openfiler | 1 |
| Ignite Realtime | Openfire | 41 |
| Igniterealtime | Openfire | 21 |
| Igniterealtime | Openfire | 41 |
| Opendaylight | Openflow | 2 |
| Opennetworking | Openflow | 2 |
| Openmairie | Openfoncier | 3 |
| Openfortivpn Project | Openfortivpn | 0 |
| 2enetworx | Openforum | 3 |
| Openftpd | Openftpd Ftp Server | 1 |
| Opengamepanel | Opengamepanel | 2 |
| Opengear | Opengear | 1 |
| Opengear | Opengear Console Server Firmware | 1 |
| Opengoo | Opengoo | 2 |
| Cisco | Openh264 | 0 |
| Openh323 Project | Openh323 | 1 |
| Openhacker Project | Openhacker | 2 |
| Openhpi | Openhpi | 1 |
| Emreturk | Openhuman | 1 |
| Openi-cms Group | Openi-cms | 2 |
| Openiam | Openiam | 5 |
| Drupal | Openid | 12 |
| Openid | Openid | 12 |
| Peter Wolanin | Openid | 10 |
| Openid | Openid4java | 1 |
| Openid | Openid Connect | 1 |
| Openidm Project | Openidm | 3 |
| Openimageio | Openimageio | 3 |
| Openimpro | Openimpro | 1 |
| Openindiana | Openindiana | 1 |
| Unknown | Opening Hours | 1 |
| Cale Dunlap | Openinvoice | 2 |
| It-novum | Openitcockpit | 6 |
| Oracle | Openjdk | 5 |
| Sun | Openjdk | 35 |
