This post comes from guest community contributor and Engine Yard alumni Andre Arko. Andre has been building web applications with Ruby and Rails for five years, and is a member of the Bundler core team. He works for Plex, tweets as @indirect, and blogs at andre.arko.net. Gem plugins in Rails 3.0 Rails 3.0 is finally released, and with it comes a fantastic new way to extend Rails: Railties. Railtie