Tip: Mantis is a free security web application (bug tracking system) written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. The Mantis Bug tracking system performs a major role in development of any external system, be it hardware or software. Mantis is very popular because of its robustness and it's easy to customize. It is written in MantisBT has been installed on Windows, Linux, Mac OS, OS/2, and others. Almost any web browser should be able to function as a client. Below are the best Mantis web hosting companies on the internet.