Watir ( “Web Application Testing in Ruby” – pronounced water ) is a sweet little system used to automate browsers for the purposes of testing your site. Unfortunately, it’s for IE on Windows. Despite being odd in that most Ruby software is Linux or MacOS it’s also frustrating because I don’t use Windows. Luckily the Tubes have granted us two alternatives, SafariWatir and FireWatir. They achieve browser automation in very different ways.