Redmine is a flexible project management web application, written using the Ruby on Rails framework. It is cross-platform and cross-database. The main features of Redmine include:

• multiple project and subproject support
• role-based security
• bug tracking system
• Gantt charts and calendars
• project- and work-based time tracking
• custom fields and interface
• document management
• project-based wikis
• SCM integration
• web feeds and eMail support
• lightweight directory access protocol (LDAP) support
• multi-language support (34 languages)

Redmine is open source and released under the terms of the GNU General Public License v2 (GPL).

More information can be found here. Redmine software can be donwloaded here.

Redmine demo on line is here.