Mantis Bug Tracker. MantisBT is a popular free web-based bug tracking system. It is written in PHP works with MySQL, MS SQL, and PostgreSQL databases. MantisBT has been installed on Windows, Linux, Mac OS, OS/2, and others. It is released under the terms of the GNU General Public License (GPL).
Open Source Security and License Management | WhiteSource. Automate your open source bug tracking to get real-time alerts on known severe software bugs in the open source components in your sofwtare.
Trac is an enhanced wiki and issue tracking system for software development projects. Trac uses a minimalistic approach to web-based software project management.
Bugzilla is a “Defect Tracking System” or “Bug-Tracking System”. Defect Tracking Systems allow individual or groups of developers to keep track of outstanding bugs in their product effectively.
JTrac – open source and customizable issue-tracking in Java. JTrac is a generic issue-tracking web-application that can be easily customized by adding custom fields and drop-downs. Features include customizable workflow, field level permissions, e-mail integration, file attachments and a detailed history view.
Redmine is a flexible project management web application. Written using the Ruby on Rails framework, it is cross-platform and cross-database.
Phabricator is a complete set of tools for developing software. Included apps help you manage tasks and sprints, review code, host git, svn, or mercurial repositories, build with continuous integration, review designs, discuss in internal chat channels, and much more. It’s fast, scalable, and fully open source. Install it locally with no limitations, or have us host it for you.
Tuleap, 100% Libre & Open Source platform for Agile Management and Software Development.