The Bug Genie is a user-friendly and powerful PHP5.3-based bug tracker/bug tracking tool with features such as project management, VCS integration (git, svn, hig), wiki and more. Ready to use out-of-the-box, and easy to install.
Vermis is an Open Source issue tracker and project management tool for software developers and project managers that has been created for improving quality of code, efficiency and speed of development. Designed as a web application written in PHP.