1 - Mantis 1.0.0 Mantis is a web-based bugtracking system. Mantis project 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. Almost any web browser should be able to function as a client. It is released under the terms of the GNU General Public License (GPL). License: Shareware OS: Unix