PHP Issue Trackers software list

Mantis


* Web: http://www.mantisbt.org/
* Requirements: PHP 4.3
* Supported databases are MySQL with stated support for Postgress, MSSQL, DB2 and Oracle.
* License: GPL


Eventum

* Web: http://dev.mysql.com/downloads/other/eventum/
* Requirements: PHP 5.1
* Supported databases is MySQL.
* License: GPL


Bugs the Bug genie

* Web: http://www.thebuggenie.com/
* Requirements: PHP 5.1.
* Supported databases is MySQL.
* License: MPL 1.1


WHUPS

* Web: http://www.horde.org/whups/
* Requirements: Horder framework 3.2+. PHP 4.3+.
* Most databases are supported.
* License: BSD license


phpBugTracker

* Web: http://phpbt.sourceforge.net/
* Requirements: PHP 4.0.6+.
* Supported databases are MySQL, PostreSQL and Oracle.
* License: BSD license


Other PHP Systems

* Flyspray - http://flyspray.org/
* FireAnt - http://chaozz.nl/software/fireant/
* zenTrack - http://www.zentrack.net