| Gesytec Easylon | Opc Server | 2 |
| Opcsystems | Opc Systems.net | 1 |
| Softing | Opc Toolbox | 2 |
| Softing | Opc Ua C\+\+ Software Development Kit | 5 |
| Asneg | Opc Ua Stack | 2 |
| Opc Ua Stack Project | Opc Ua Stack | 2 |
| Honeywell | Opc Ua Tunneller | 4 |
| Siemens | Opcenter Execution Core | 4 |
| Siemens | Opcenter Execution Discrete | 3 |
| Siemens | Opcenter Execution Foundation | 3 |
| Siemens | Opcenter Execution Process | 3 |
| Siemens | Opcenter Intelligence | 3 |
| Siemens | Opcenter Quality | 9 |
| Siemens | Opcenter Quality V13.1 | 1 |
| Siemens | Opcenter Quality V13.2 | 1 |
| Siemens | Opcenter RD&L | 3 |
| Opcsystems | Opcsystems.net | 2 |
| Opcua Project | Opcua | 2 |
| Freeopcua | Opcua-asyncio | 2 |
| Open Babel | Open Babel | 14 |
| Open Build Service | Open Build Service | 14 |
| SUSE | Open Build Service | 14 |
| OpenSUSE | Open Build Service | 14 |
| Alkacon | Open CMS | 2 |
| Open Dental | Open Dental | 3 |
| Microsoft | Open Enclave SDK | 4 |
| Emerson | Open Enterprise | 1 |
| Micro Focus International | Open Enterprise Server | 1 |
| Talos | Open Fire User Import Export Plugin | 1 |
| Niels Van Renselaar | Open Graph Metabox | 1 |
| Webdados | Open Graph For Facebook, Google+ And Twitter Card Tags | 1 |
| Rocket Apps | Open Graphite | 1 |
| Dell EMC | Open Manage System Administrator | 2 |
| Microsoft | Open Management Infrastructure | 6 |
| IET-OU | Open Media Player | 1 |
| Tussendoor Internet & Marketing | Open RDW Kenteken Voertuiginformatie | 1 |
| Dokan | Open Source File System | 1 |
| Talend | Open Studio For MDM | 2 |
| 100plugins | Open User Map | 1 |
| Open-audit | Open-audit | 22 |
| Opmantek | Open-audit | 22 |
| Open-ftpd | Open-ftpd | 1 |
| Open-gorotto | Open-gorotto | 1 |
| Open-graph Project | Open-graph | 1 |
| Open-iscsi Project | Open-iscsi | 3 |
| Open-medium | Open-medium Cms | 1 |
| Open-realty | Open-realty | 5 |
| Open-school | Open-school | 5 |
| Open-uri-cached Project | Open-uri-cached | 1 |
| Vmware | Open-vm-tools | 3 |
| Open-xchange | Open-xchange | 2 |
| Open-xchange | Open-xchange Appsuite | 142 |
| Open-xchange | Open-xchange Appsuite Backend | 1 |
| Open-xchange | Open-xchange Appsuite Frontend | 1 |
| Open-xchange | Open-xchange Documents | 3 |
| Open-xchange Ox Guard | Open-xchange Ox Guard | 1 |
| Open-xchange | Open-xchange Server | 13 |
| Open.gl Project | Open.gl | 1 |
| Open5GS | Open5GS | 8 |
| Unspecified | Open5GS | 8 |
| Free5Gc | Open5Gc | 1 |
| Open5gs | Open5gs | 11 |
| Open62541 | Open62541 | 2 |
| Open Source Solution Technology Corporation | OpenAM | 3 |
| OpenAM Consortium | OpenAM | 3 |
| OpenIdentityPlatform | OpenAM | 3 |
| OpenAM Consortium | OpenAM (Open Source Edition) | 1 |
| OpenAM Consortium | OpenAM (OpenAM Consortium Edition) | 1 |
| OpenAM Consortium | OpenAM Web Policy Agent (OpenAM Consortium Edition) | 1 |
| IBM | OpenBMC | 3 |
| OpenBMC Project | OpenBMC | 3 |
| Plat'Home Co.,Ltd. | OpenBlocks IoT VX2 | 2 |
| Johnson Controls | OpenBlue Enterprise Manager Data Collector | 2 |
| Unknown | OpenBook Book Data | 1 |
| CRIXP | OpenCRX | 1 |
| Hewlett Packard Enterprise | OpenCall Media Platform (OCMP) | 2 |
| Open Source | OpenClinic GA | 7 |
| OpenClinica | OpenClinica | 2 |
| OpenCloudOS | OpenCloudOS Stream | 1 |
| MightyPirates | OpenComputers | 1 |
| OCI | OpenDDS | 5 |
| OpenDDS | OpenDDS | 5 |
| OpenDayLight | OpenDayLight | 1 |
| Life Sciences Computing Corporation | OpenDolphin | 3 |
| OpenEMR | OpenEMR | 1 |
| Emerson | OpenEnterprise | 1 |
| Emerson | OpenEnterprise SCADA Server | 1 |
| Emerson | OpenEnterprise SCADA Software | 3 |
| Oracle Corporation | OpenGrok | 1 |
| OpenHarmony | OpenHarmony | 38 |
| Brazenlygeek | OpenHook | 1 |
| Daggerhart | OpenID Connect Generic Client | 1 |
| ForgeRock Inc. | OpenIDM And Java Remote Connector Server (RCS) | 1 |
| OpenImageIO Project | OpenImageIO | 28 |
| N/a | OpenImageIO | 28 |
| Eclipse Foundation | OpenJ9 | 1 |
| OpenJDK, OracleJDK | OpenJDK (HotSpot VM) | 1 |
| OpenKM | OpenKM | 3 |
| Unspecified | OpenKM | 3 |
| OpenKM | OpenKM Document Management Community | 1 |
