- Accelerate4
- ActiveGrid
- Ancud IT-Beratung GmbH
- Architel
- Ayamon
- Bitrock
- Bounty Source
- CIGNEX
- Canonical
- Concursive Corporation
- Core Developers Network
- Coridan Inc
- Covalent Technologies
- DevZuz
- Digium
- Dimdim
- EnterpriseDB
- Funambol
- Gluecode Software
- GroundWork
- Halosys Technologies Inc.
- Hyperic
- Indiginox
- Intalio
- Interface21
- JBoss Group
- JGraph Ltd
- Janus Software
- Krugle
- Lemur Consulting Ltd
- LogicBlaze
- MARVELit
- Mergere
- Mindquarry GmbH
- MuleSource
- Navica
- OSAF
- Obinary (now Magnolia International)
- ObjectWeb
- OpenLogic
- OpenSourceMatters
- OpenXource
- Openexchange
- Openstrike
- Optaros
- Orixo
- Pentaho
- Progeny
- Quanam
- SQLFusion
- Sleepycat Software
- Sonatype
- SourceBeat
- SourceKibitzer.org
- SourceLabs
- Sourcesense
- Specifix
- SpikeSource
- The Globus Consortium
- Untangle: Open Source Security Gateway
- Virtuas Solutions
- Vyatta
- W3C Consortium
- WSO2
- WebTide
- XenSource
- Zend
- Zenoss
- Zimbra
- Zmanda
- enomaly
- nexB
- vtiger
