In addtion to fitnesse which is delivered as part of the download, several additional components are required on the client side to run the acceptance tests. To leverage an existing web automation library (WATIR), tests are written in Ruby.
1. Ruby 1.8.4 or higher: available at http://rubyforge.org/projects/ruby/. For Windows, there is a one-click installer at http://rubyforge.org/projects/rubyinstaller/.
2. WATIR 1.4.1 or higher: available at http://wtr.rubyforge.org/. WATIR is the web automation testing library that drives the Internet Explorer.
3. AutoIt: available at http://www.hiddensoft.com/AutoIt/.This automation library is used to control the mouse and interact with Windows Dialogs.