Vim for Rails: rails.vim plugin
Tags: vim ide
rails.vim is a vim plugin for syntax highlighing, easy navigation, and script invocation for all your Ruby on Rails applications.
Install rails.vim
Extract the zip file to ~/.vim (or vimfiles on Windows). To use the help, see :help add-local-help. In a nutshell, :helptags ~/.vim/doc.
For details, see :help rails