https://sourceforge.net/projects/phpadsnew/

Revive Adserver (ex OpenX Source, phpAdsNew) is an open-source ad server, with an integrated banner management interface and tracking system for gathering statistics.

http://www.refbase.net/index.php/Web_Reference_Database

https://sourceforge.net/projects/phpmyviews/

https://github.com/kerphi/phpfreechat

phpfreechat is a simple web based chat

http://phpformgen.sourceforge.net/

phpFormGenerator is an easy, online tool for creating reliable, efficient, and aesthetically pleasing web forms in a snap.

https://sourceforge.net/projects/openit/

http://www.open-realty.org/

https://www.mantisbt.org/

http://www.httrack.com/

HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.

http://www.flyspray.org/

Flyspray is a lightweight, web-based bug tracking system written in PHP for assisting with software development and project managements.