An open source bug tracking system running on any web server allowing the execution of tdbengine binaries. It is distributed under the terms of the GPL.
Open source PHP-MySQL bug tracking system that has customizable CSS/XHTML templates, e-mail notifications, Atom syndication and internationalization support.
Open source issue tracking and project issue management solution built using the ASP.NET web application framework. Features e-mail notifications, reporting and per project configuration of fields and values.
Open source web-based bug tracking system written on PHP, provides features such as custom templates, advanced filters, LDAP support, email notifications and graphical project metrics.