Drupal (core)

TYPO3 CMS   (Compare Project)

Very High Activity

Mostly written in PHP

License: GPL-2.0+

Tiki Wiki CMS Groupware   (Compare Project)

Very High Activity

Mostly written in PHP

License: LGPL-2.1

ImpressCMS   (Compare Project)

High Activity

Mostly written in PHP

License: GPL-2.0+

Arta   (Compare Project)

New Project

Mostly written in PHP

License: GPL-3.0+

Chisimba   (Compare Project)

Activity Not Available

Mostly written in PHP

License: GPL-2.0+

HaveFnuBB   (Compare Project)

Activity Not Available

Mostly written in PHP

License: GPL-2.0+

XOOPS Cube   (Compare Project)

Activity Not Available

Mostly written in PHP

License: BSD-4-Clause-UC, GPL-2.0+

glFusion CMS   (Compare Project)

Activity Not Available

Mostly written in PHP

License: GPL-2.0+

Elefant CMS   (Compare Project)

High Activity

Mostly written in PHP

License: MIT

La Nai CMS   (Compare Project)

Inactive

Mostly written in PHP

License: GPL-3.0

Drupal (contributions)   (Compare Project)

Very Low Activity

Mostly written in PHP

License: Unknown

Ubercart   (Compare Project)

Moderate Activity

Mostly written in PHP

License: GPL-2.0+

drush   (Compare Project)

High Activity

Mostly written in PHP

License: GPL+link

Aegir Hosting System   (Compare Project)

Moderate Activity

Mostly written in PHP

License: GPL-2.0+

e-Commerce for Drupal   (Compare Project)

Activity Not Available

Mostly written in PHP

License: GPL-2.0+

ophcrack   (Compare Project)

Activity Not Available

License: GPL-2.0+

CiviCRM   (Compare Project)

Very High Activity

Mostly written in PHP

License: AGPL-3.0

Joomla!   (Compare Project)

Very High Activity

Mostly written in PHP

License: GPL-2.0+

WordPress   (Compare Project)

Very High Activity

Mostly written in PHP

License: GPL-2.0+

Drupal Gravatar integration   (Compare Project)

Activity Not Available

Mostly written in PHP

License: GPL-2.0+