RubyGems.org

Once the gem is installed, in every gem install command you'll get a message with info fetched from isitjruby.com website. Also you'll have a gem isitjruby command for getting those messages for the gem already installed in your system

installgem install rubygems-isitjruby
Authors

blaxter, Eric Hodel

1,384 total downloads 1,380 for this version
Owners

98d59cb0d26c7166763d5ee51704563b

Gemfile
gem 'rubygems-isitjruby', '~> 1.1.2'
Versions
  1. 1.1.2 August 24, 2009 (7.5 KB)
Runtime Dependencies
  1. json-jruby >= 1.1.7