Ruby Thread Validator, a thread analysis and thread deadlock detection 
tool for Ruby.

This tool is now in beta.

http://www.softwareverify.com/rubyThreadValidator/index.html

Stephen
-- 
Stephen Kellett
Object Media Limited    http://www.objmedia.demon.co.uk
RSI Information:        http://www.objmedia.demon.co.uk/rsi.html