| Openi-cms Group | 1 | 2 |
| Openid | 3 | 17 |
| Openidc | 1 | 16 |
| Openidm Project | 1 | 3 |
| Openimpro | 1 | 1 |
| Openinferno | 1 | 1 |
| Openinfosecfoundation | 1 | 41 |
| Openit | 1 | 1 |
| Openjournal | 1 | 1 |
| Openjpeg | 1 | 78 |
| Openjsf | 2 | 10 |
| Openkm | 1 | 14 |
| Openlayers | 1 | 1 |
| Openld | 1 | 2 |
| Openldap | 2 | 62 |
| Openlibrary | 1 | 1 |
| Openlink | 1 | 1 |
| Openmairie | 10 | 23 |
| Openmedia | 1 | 1 |
| Openmediavault | 1 | 3 |
| Openmicroscopy | 1 | 7 |
| Openmosix Project | 1 | 2 |
| Openmosixview | 1 | 1 |
| Openmpt | 2 | 14 |
| Openmrs | 6 | 21 |
| Opennetworking | 2 | 36 |
| Opennms | 1 | 15 |
| Opennms.org | 1 | 15 |
| Openntpd | 1 | 1 |
| Openobex | 1 | 1 |
| Openocd | 1 | 1 |
| Openoffice | 2 | 44 |
| Openpbs | 1 | 1 |
| Openpegasus | 2 | 5 |
| Openpgp | 1 | 2 |
| Openpgpjs | 1 | 5 |
| Openphpnuke | 1 | 1 |
| Openpinboard | 1 | 1 |
| Openpkg | 1 | 7 |
| Openplcproject | 4 | 6 |
| Openprinting | 1 | 1 |
| Openpro | 1 | 1 |
| Openproject | 1 | 8 |
| Openpsa2 | 1 | 2 |
| Openr | 1 | 2 |
| Openradius | 1 | 2 |
| Openrat | 2 | 3 |
| Openrazer | 1 | 1 |
| Openrefine | 1 | 8 |
| Openreplay | 1 | 1 |
| Openresty | 1 | 4 |
| Openrobotics | 1 | 0 |
| Opensc Project | 1 | 42 |
| Opensc-project | 1 | 42 |
| Opensearch-project | 5 | 17 |
| Opensef Project | 1 | 1 |
| Openser | 2 | 5 |
| Openshift | 1 | 8 |
| Openshift Enterprise | 1 | 1 |
| Opensiteadmin | 1 | 2 |
| Openskip | 1 | 2 |
| Openslp | 1 | 9 |
| Openslp-dfsg | 1 | 1 |
| Opensolution | 6 | 28 |
| Opensource Classified Ads Script Project | 1 | 4 |
| Opensource Technologies | 1 | 1 |
| Opensourcebms | 1 | 1 |
| Opensourceclassifieds | 1 | 1 |
| Openssl | 2 | 265 |
| Openssl Software Foundation | 1 | 264 |
| Openssl.js Project | 1 | 1 |
| Openstack | 55 | 606 |
| Openstack Foundation | 1 | 2 |
| Openstack-dashboard | 1 | 0 |
| Openstack-nova | 1 | 1 |
| Openstack-utils | 1 | 0 |
| Opensurveypilot | 1 | 1 |
| Opensuse | 26 | 4350 |
| Opensuse Project | 9 | 4124 |
| Openswan | 2 | 22 |
| Opensymphony | 2 | 8 |
| Opensynergy | 1 | 1 |
| Opentext | 19 | 111 |
| Opentools | 1 | 4 |
| Opentsdb | 1 | 7 |
| Openttd | 1 | 20 |
| Opentype Sanitiser Project | 1 | 1 |
| Openvas | 2 | 6 |
| Openvas-scanner | 1 | 1 |
| Openvcloud Project | 1 | 1 |
| Openvmps | 1 | 1 |
| Openvpn | 2 | 53 |
| Openvpn Technologies, Inc | 1 | 33 |
| Openvswitch | 1 | 23 |
| Openvz | 2 | 4 |
| Openwall | 2 | 4 |
| Openwbem | 1 | 1 |
| Openwebanalytics | 1 | 7 |
| Openwebif Project | 1 | 4 |
| Openwebmail.acatysmoof | 1 | 1 |
