I found this one (although it's for RoR):
http://www.ilovejackdaniels.com/ruby-on-rails/ruby-on-rails-cheat-sheet/



> http://www.zenspider.com/Languages/Ruby/QuickRef.html
> http://www.testingeducation.org/conference/wtst3_pettichord9.pdf
> http://www.ruby-doc.org/doxygen/1.8.4/functions_vars.html
> http://www.petefreitag.com/item/455.cfm
> 
> http://ruby-pdf.rubyforge.org/pdf-writer/demos/Ruby-Language-QuickRef.pdf
> 
> http://www.blainekendall.com/index.php/rubyonrailscheatsheet/
> 
>