Mantis is a web-based bugtracking system. It is in active development and is no longer considered beta. It is written in the PHP scripting language and requires the MySQL database and a webserver. Mantis has been installed on Windows, MacOS, OS/2, and a variety of Unix operating systems. Any web browser should be able to function as a client. It is released under the terms of the GNU General Public License (GPL). Mantis is free to use and modify. It is free to redistribute as long as you abide by the distribution terms of the GPL. WWW: http://www.mantisbt.org/