| Arista | O-105 Firmware | 6 |
| Arista | O-90 Firmware | 8 |
| Abidia | O-anywhere | 1 |
| O-kiraku Nikki | O-kiraku Nikki | 1 |
| Telefonica | O2 Business | 1 |
| Zyxel | O2 Dsl Router Classic | 1 |
| Zoneland | O2oa | 2 |
| O2tweet Project | O2tweet | 1 |
| Siag | O3read | 1 |
| IBOS | OA | 29 |
| Jiusi | OA | 29 |
| Tongda | OA | 29 |
| Weaver | OA | 29 |
| Cnoa | OA | 29 |
| Tongda | OA 2017 | 24 |
| OCLC-Research | OAICat | 1 |
| HGiga | OAKSv20 OAKlouds-document V3 | 1 |
| HGiga | OAKSv20 OAKlouds-document V3 2.0 | 1 |
| HGiga | OAKSv20 OAKlouds-mol Course V3 2.0 | 1 |
| HGiga | OAKSv30 OAKlouds-document V3 | 1 |
| HGiga | OAKSv30 OAKlouds-document V3 3.0 | 1 |
| HGiga | OAKSv30 OAKlouds-mol Course V3 3.0 | 1 |
| HGiga | OAKlouds | 1 |
| HGiga | OAKlouds OAKSv2 | 2 |
| HGiga | OAKlouds OAKSv3 | 2 |
| Open Automation Software | OAS Platform | 16 |
| MiniOrange | OAuth 2.0 Client For SSO (WordPress Plugin) | 1 |
| Unknown | OAuth Client By DigitialPixies | 2 |
| Unknown | OAuth Single Sign On | 1 |
| MiniOrange | OAuth Single Sign On Enterprise | 1 |
| MiniOrange | OAuth Single Sign On Free | 1 |
| MiniOrange | OAuth Single Sign On Premium | 1 |
| MiniOrange | OAuth Single Sign On Standard | 1 |
| Unknown | OAuth Single Sign On – SSO (OAuth Client) | 2 |
| MiniOrange | OAuth Single Sign On – SSO (OAuth Client) | 2 |
| Unknown | OAuth Client Single Sign On For WordPress ( OAuth 2.0 SSO ) | 1 |
| OAuth2 Proxy | OAuth2 Proxy | 3 |
| Pusher | OAuth2 Proxy | 3 |
| Proliz | OBS | 1 |
| Karsany | OBridge | 1 |
| Open Design Alliance | ODA Drawings SDK - All Versions < 2024.10 | 1 |
| Open Design Alliance | ODA Drawings SDK - All Versions < 2024.12 | 1 |
| Oracle Corporation | ODBC Driver | 1 |
| OECMS | OECMS | 1 |
| Apache | OFBiz | 5 |
| OFBiz | OFBiz | 5 |
| Topaz | OFD | 1 |
| Schneider Electric | OFS V3.5 | 1 |
| Mario Valney | OG Tags | 1 |
| 3D City Database | OGC Web Feature Service | 1 |
| Pepper+Fuchs | OHV | 1 |
| Pepper+Fuchs | OIT | 1 |
| Texas Instruments | OMAP | 3 |
| OpenModelica | OMCompiler | 1 |
| HP Inc. | OMEN Gaming Hub SDK | 1 |
| HP Inc. | OMEN Gaming Hub And HP Command Center | 1 |
| Daanvandenbergh | OMGF | GDPR/DSGVO Compliant, Faster Google Fonts. Easy. | 1 |
| Unknown | OMGF | Host Google Fonts Locally | 3 |
| ITPison | OMICARD EDM | 5 |
| ITPison | OMICARD EDM 's SMS | 3 |
| Dell | OMIMSSC (OpenManage Integration For Microsoft System Center) | 3 |
| OMRON Corporation | OMRON CX-Supervisor | 1 |
| Veeam | ONE | 2 |
| Milwaukee Tool | ONE-KEY | 2 |
| The Linux Foundation | ONOS | 4 |
| The Linux Foundation | ONOS SDN Controller | 1 |
| Lanaccess | ONSAFE MonitorHM | 1 |
| NetApp | ONTAP 9 | 2 |
| NetApp | ONTAP Mediator | 1 |
| NetApp | ONTAP Select Deploy Administration Utility | 2 |
| Bosch | ONVIF Camera Event Driver Tool | 1 |
| OOPSpam | OOPSpam Anti-Spam | 2 |
| Linaro/OP-TEE | OP-TEE | 7 |
| Softing Industrial Automation All Versions Prior To The Latest Build Of Version 4.47.0 | OPC | 2 |
| ABB | OPC Data Link | 5 |
| Schneider Electric | OPC Factory Server (OFS) | 1 |
| ABB | OPC Server For AC 800M | 2 |
| ABB | OPC Server For Mod 300 (non-800xA) | 5 |
| Unified Automation | OPC UA C++ Demo Server | 2 |
| Softing | OPC UA C++ SDK | 1 |
| Softing | OPC UA C++ SDK (Software Development Kit) | 1 |
| Schneider Electric | OPC UA Modicon Communication Module | 7 |
| PTC | OPC-Aggregator | 4 |
| N/a | OPC-Aggregator | 4 |
| OPEN JOURNAL SYSTEMS | OPEN JOURNAL SYSTEMS | 1 |
| IBM | OPENBMC | 2 |
| OPENJPEG | OPENJPEG | 1 |
| OPPO | OPPO Find X3 | 1 |
| OPPO | OPPO Store | 1 |
| Daisuke Takahashi(Extend Wings) | OPcache Dashboard | 1 |
| Endress+Hauser | ORSG35 - Ecograph T Neutral/Private Label | 2 |
| Endress+Hauser | ORSG45 - Memograph M Neutral/Private Label | 1 |
| Huawei | OSCA-550 | 1 |
| Huawei | OSCA-550, OSCA-550A | 1 |
| Huawei | OSCA-550, OSCA-550A, OSCA-550AX, OSCA-550X | 1 |
| Huawei | OSCA-550A | 1 |
| Huawei | OSCA-550AX | 1 |
| Huawei | OSCA-550AX, OSCA-550X | 1 |
| Huawei | OSCA-550X | 1 |
| Huawei | OSD | 1 |
