It allows users to manage multiple projects and associated 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.