Redmine is a free and open source, web-based project management and issue tracking tool. It handles multiple projects and subprojects. It features per project wikis and forums, time tracking, and flexible role based access control. It includes a calendar and Gantt charts to aid visual representation of projects and their deadlines. Redmine integrates with various version control systems and includes a repository browser and diff viewer.
The design of Redmine is significantly influenced by Trac, a software package with some similar features.
Redmine is written using the Ruby on Rails framework. It is cross-platform and cross-database and supports 34 languages.