N30-CMS

IXThemes   (Compare Project)

License: gpl

Wolf CMS   (Compare Project)

Mostly written in PHP

License: gpl3

XOOPS Cube   (Compare Project)

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License: bsd, gpl

Contao   (Compare Project)

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License: lgpl21

ClanSphere   (Compare Project)

Mostly written in PHP

License: bsd

papaya CMS   (Compare Project)

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License: gpl

TangoCMS   (Compare Project)

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License: gpl, lgpl

BEdita   (Compare Project)

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Diem, a symfony CMS & CMF   (Compare Project)

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Clansuite   (Compare Project)

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License: Unknown