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Apache Cocoon

Django (web framework)

Zope

Play Framework

Ruby on Rails

MODX

PHPUnit

BuddyPress

Composer (software)

Hack (programming language)

HHVM

Internet Messaging Program

Mambo (software)

Mantis Bug Tracker

Matomo (software)

Nextcloud

Nucleus CMS

OpenMediaVault

Phabricator

Phalanger (compiler)

PHP-Nuke

PhpBB

PhpMyAdmin

Piwigo

Roundcube