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. It is part of the Bitnami app library that provides an installer and virtual machine for ease of deployment.
Following concerns with the way the feedback and patches from the Redmine community were being handled a group of Redmine developers created a fork of the project in February 2011. The fork was initially named Bluemine, but changed to ChiliProject after.