paBugs is a bug tracker designed to help developers organize bugs in their programs/scripts. It has an easy to use interface making browsing the database simple and a full featured, easy to use admin center for managing the bug database. Written in PHP and using MySQL for the data backend, paBugs is a fast, server/CPU-friendly script.
A PHP replacement for bugzilla, focusing on separating the presentation, application, and database layers by using templates and a database abstraction layer.
Mantis is a web-based bugtracking system. The goals for this project are to produce and maintain a lightweight, simple bugtracking system. Additions of complexity/features are modular so that users can be shielded from unwanted clutter.