imitator_x

https://github.com/Quintus/imitator

The Imitator for X library allows you to simulate key and mouse input to any Linux system that uses the X server version 11. Features also include CD/DVD drive control and direct interaction with Windows, wrapped as Rubyish objects. It's a Ruby 1.9-only library. Please also note that this is a C extension that will be compiled during installing.