Webuzo for Mantis Bug Tracker

MantisBT is a free popular web-based bug tracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. MantisBT can be installed on Windows, Linux, Mac OS, OS/2, and others. Almost any web browser should be able to function as a client.
LicenseFree to try
Operating System Windows XP Windows Vista Windows NT Windows Windows 2003 Windows 2000 Windows Server 2008 Windows 7
System RequirementsVMWare/VirtualBox/Parallels