Watir (pronounced water) stands for Web Application Testing in Ruby. Watir is an open-source (BSD) family of Ruby libraries for automating web browsers. It is distributed as a Ruby GEM named 'Watir'. Watir was primarily developed by Bret Pettichord and Paul Rogers.
Watir (Web Application Testing in Ruby, pronounced water), is an open-source (BSD) family of Ruby libraries for automating web browsers. It drives Internet Explorer, Firefox, Chrome, Opera and Safari, and is available as a RubyGems gem.
You can find more about Watir at the Watir web site and the Watir Google group.