MoinMoin

XWiki   (Compare Project)

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License: LGPLv2_1-no3-no13

Foswiki   (Compare Project)

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License: gpl

Hatta Wiki   (Compare Project)

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glFusion CMS   (Compare Project)

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License: gpl

Piggydb   (Compare Project)

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License: apache_2

Internet Discussion Boards   (Compare Project)

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License: BSD-3-Clause, lgpl21_or_later

Owl Intranet Knowledgebase   (Compare Project)

License: gpl

XOOPS Dynamic Web CMS   (Compare Project)

Mostly written in PHP

License: gpl

XOOPS Cube   (Compare Project)

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License: bsd, gpl

Xlab XOOPS Cube Module Project   (Compare Project)

Mostly written in PHP

License: bsd, gpl