https://www.mediawiki.org/wiki/MediaWiki

https://www.dokuwiki.org/dokuwiki

https://www.boltwire.com/downloads

BoltWire's development has been guided by a philosophy that can be summed up in four key principles: keep it simple, small, strong and secure.

http://zeronotice.org/

http://wildweb.sourceforge.net/

WildWEB is an open source framework for web application development.

http://wtfw.sourceforge.net/

https://symfony.com/

Symfony is a set of reusable PHP components... The standard foundation on which the best PHP applications are built. Choose any of the 30 stand-alone components available for your own applications.

http://mojavelinux.com/projects/studs/

http://www.seagullproject.org/

http://phphtmllib.newsblob.com/