There are lot of plugins available in github and redmine.org for executing your project using Agile Scrum methodology. Most of the plugins are not supported for redmine version 4.1.x or above. The supported plugins for latest redmine version are paid. There is scrum plugin with available which you can download and test it. It has all the advanced features for sprint and product backlog. While it does not have features like drag and drop sprint tasks from one state to other state. These features are available in paid version of redmineup agile plugin. Also this drag and drop of tasks is available in teamwork. Lets start with installation of scrum plugin, which has sprint view and product backlog view.