Redmine

Redmine is an open-source, web-based project management and issue tracking application written in Ruby on Rails. It provides a flexible platform for managing multiple projects, tracking issues, and coordinating team collaboration.

Key features include issue tracking with customizable trackers, statuses, priorities, and fields; project wikis, forums, documents, and news; Gantt charts and calendars for scheduling; built-in time tracking and a role-based access control system for projects and subprojects.

Redmine supports repositories and version control integration with systems such as Git, Subversion, and Mercurial. It is database-agnostic, running on platforms that support Ruby and Rails, with typical installations using MySQL, PostgreSQL, or SQLite.

Extensibility is provided through a plugin architecture and a RESTful API, enabling custom features and integrations. The project is maintained by a community of contributors and has translations in many languages.

Redmine is released under the GNU General Public License (GPL) v2 or later and originated in 2006 as a project by Jean-Philippe Lang. It is used by a variety of development teams and organizations for planning, tracking, and reporting.