init.rb

require 'redmine'

Redmine::Plugin.register :my_plugin_name do
  name 'My Plugin Name'
  author 'Eric Davis'
  url 'https://projects.littlestreamsoftware.com'
  author_url 'http://www.littlestreamsoftware.com'
  description "Does stuff"
  version '0.1.0'
 
  menu(:top_menu, :name_of_the_link_to_google, 'http://google.com')
  menu(:top_menu, :name_of_the_link_to_redmine, 'http://www.redmine.org')
end