https://coppermine-gallery.net/

Coppermine is a multi-purpose fully-featured and integrated web picture gallery script written in PHP using GD or ImageMagick as image library with a MySQL backend.

https://www.4homepages.de/

https://webcollab.sourceforge.io/

https://info.tiki.org/tiki-index.php

Tiki CMS/Groupware, also known as TikiWiki, is a powerful web-based Groupware and Content Management System (CMS), using the PHPexternal link, ADOdb external link and smart external link.

https://www.egroupware.org/en/community/

https://dotproject.net/

dotProject is a volunteer supported Project Management application. There is no "company" behind this project, it is managed, maintained, developed and supported by a volunteer group and by the users themselves.

http://www.collabtive.o-dyn.de/

Collabtive is web-based project management software. Collabtive is intended for small to medium-sized businesses and freelancers.

https://www.seeddms.org/index.php?id=2

SeedDMS is the continuation of LetoDMS because it has lost its main developer. SeedDMS is easy to use but powerful Open Source Document Management System based on PHP and MySQL or sqlite3.

https://english.openims.com/index.php

https://www.kbpublisher.com/