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.
Free web-based bug tracking system written on PHP. Some of the main features are: fully custom templates, advanced filters, LDAP support, email notifications, subscriptions, reminders, flexible permissions management, graphical project metrics, etc.