Semantichacker is a project mainly written in Ruby, it's free.
Ruby wrapper for http://semantichacker.com API
A really simple Ruby wrapper for Semantic Hacker API (http://semantichacker.com)
Code originally taken from http://hamishrickerby.com/2009/02/26/dealing-with-semantichacker-in-ruby/ and modified to add support for URI's, nicer abstraction, etc.
See test.rb for example usage.
Feel free to fork the repository :)
-- Maku http://makuchaku.in