http://www.mantisbt.org/
Mantis is a web-based bugtracking system. It is written in the PHP scripting language and requires the MySQL database and a webserver. Mantis has been installed on Windows, Mac OS, 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).
Mantis is free to use and modify. It is free to redistribute as long as you abide by the distribution terms of the GPL.
History
Mantis started as an internal bug tracking tool for a pet project (video game). Good, free packages were lacking at the time so a bugtracker was written. Since then, Mantis has been totally re-written and made available to the public.
Goals
The goals for this project are to produce and maintain a lightweight and simple bugtracking system. Additions of complexity and/or features are modular and configurable so that users can be shielded from unwanted clutter.
The product is designed to be easily modifiable, customizable, and upgradeable. Anyone with intermediate PHP and MySQL experience should be able to customize Mantis to suit their needs.
Features and Benefits
* Free
* Easy installation
* Web-based
* Platform-independent
* Multiple projects
* Multiple languages
* Emailing
* Simple Search
* Viewing filters
* PHP
Linear Mode
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