JRubyArt is a ruby wrapper for 3.4. Create processing sketches in ruby using regular ruby-2.2 syntax, and use the magic JRuby to run them. You can use both rubygems and and regular processing libraries in your sketches. Features create, run, watch and live modes (uses pry). In this blog I will post articles that should be interesting for people coming to JRubyArt from both ruby and processing backgrounds (although some knowledge of both is assumed).
NB: this blog has been updated for JRubyArt-1.4.1+