 | Microsoft Corporation |
| Outlook Freestuff |
| Pivotal Software, Inc. |
| Pivotal Relationship software |
| Slipstick Systems |
| List of Outlook Add-ins |
| Sales Solutions Systems, Inc. |
| Optimus Pro software |
| Microsoft Third-Party List |
| List of third-party Outlook add-ons |
| Lucent Technologies |
| Unified Messenger |
| Transend Corporation |
| cc:Mail to Outlook/Exchange migration and coexistence tools |
| Ornic Technologies Inc. |
| Outlook add-ins and custom actions |
| DBit Add-ins |
| Several Outlook add-ins |
| US East |
| Outlook Developer's Site |
| Outlook 98 SuperGuide |
| Insider's Tips |
| JTECH Software |
| Wireless Secretary Pro for Outlook |
| Platinum Software Corporation |
| Clientele products |
