Ruby Support
For Ruby support we recommend the Ruby Stomp Client
Ruby Stomp
Here's the Ruby client for Stomp, written by Brian McCallister.
Package: http://rubyforge.org/projects/stomp/
Source: http://svn.codehaus.org/stomp/ruby/trunk/
Also package dup as a gem:
ActiveMessaging
If you are working with Rails you might want to check out ActiveMessaging.