Redmine is an intuitive and handy utility that lets you to manage complex projects with smallest effort and it is cross-database and cross-platform, written using Ruby on Rails framework. It can be extended with the help of plugins and has multi-language support. This application offers several core features such as feeds & email notifications, documents, news, & files management, flexible issue tracking system, Gantt chart and calendar, flexible role-based access control, and multiple projects support. You can get help with multiple LDAP authentication support, issue creation through email, and SCM integration. The program is licensed under GNU GPL and supported on Windows, Mac OS X, Linux, online, etc. There are many other options like time tracking, per project forums, per project wiki, and custom fields for time-entries, issues, users, and projects. Redmine is a flexible project management web application that provides multiple databases support, Multi-language support, and user self-registration support.