ruby-tools is a minor mode for Emacs that can be used with ruby-mode. It includes various handy functions that will improve your productivity. To use ruby-tools-mode, make sure that this file is in Emacs load-path: (add-to-list 'load-path "/path/to/directory/or/file") Then require ruby-tools: (require 'ruby-tools) ruby-tools-mode is automatically started in ruby-mode.