[CentOS] Web based project management recomendations

I was wondering if anyone can recommend an advanced to enterprise  
class project management package (web based) that runs with a pretty  
"vanilla" centos install. I would prefer to stick within the realm of  
php/mysql (as I am not too familiar with the java servers), but would  
venture there if the reasons were there to do so.

The approach is not software dev management, but rather just project  
(of any kind) management.

Thanks in advance.

d