Similar to オープンソースソフトウェア協会

Launchpad (website)

OpenForum Europe

Open Source Applications Foundation

OpenDocument Format Alliance

OSDN

SourceForge

Symbian Foundation

The Document Foundation

X.Org Foundation

Xiph.Org Foundation

The Apache Software Foundation

Inner source

Eclipse Foundation

Business models for open-source software

History of free and open-source software

Open Source Initiative

Open-source software security

The Open Source Definition

OpenAtom Foundation

The Cathedral and the Bazaar

CoderDojo

Stack Overflow