Mantis Bug Tracker is a free and open source, web-based bug tracking system. The most common use of MantisBT is to track software defects. However, MantisBT is often configured by users to serve as a more generic issue tracking system and project management tool. The name Mantis and the logo of the project refer to the insect family Mantidae, known for the tracking of and feeding on other insects, colloquially referred to as "bugs". The name of the project is typically abbreviated to either MantisBT or just Mantis. History Kenzaburo Ito started development of the Mantis Bug Tracking project in 2000. In 2002, Kenzaburo was joined by Jeroen Latour, Victor Boctor and Julian Fitzell to be the administrators and it became a team project. Version 1.0.0 was released in February 2006. Version 1.1.0 was released in December 2007. In November 2008, after a long discussion, the project switched from using the Subversion revision control tool to Git, a distributed revision control tool. In February 2010, version 1.2.0 was released. In July 2012, the MantisBT organization on GitHub became the official repository for the Project's source code. Features Plug-ins An event-driven plug-in system was introduced with the release of version 1.2.0. This plug-in system allows extension of MantisBT through both officially maintained and third party plug-ins. As of November 2013, there are over 50 plug-ins available on the MantisBT-plugins organization on GitHub. Prior to version 1.2.0, a third party plug-in system created by Vincent Debout was available to users along with a variety of different plug-ins. This system was not officially supported by the MantisBT project and is incompatible with MantisBT 1.2.0 and later. Notifications MantisBT supports the sending of e-mail notifications upon changes being made to issues in the system. Users have the ability to specify the type of e-mails they receive and set filters to define the minimum severity of issues to receive notifications about. Users also have the ability to explicitly subscribe to issues that affect them. RSS feeds are available for users who wish to keep track of issues that have been resolved. Additionally, MantisBT has integration with Twitter via a plugin, to allow a notification to be tweeted when an issue is resolved. Via MantisBT's event-driven plug-in system, it is possible to extend the built in notification support to run advanced scripts that perform additional notification actions (such as sending SMS messages or updating statuses in