daru-view (rubygems):   Daru (Data Analysis in RUby) is a library for analysis, manipulation and   visualization of data. Daru-view is for easy and interactive plotting in web   application & IRuby notebook. It can work in frameworks e.g. Rails, Sinatra,    Nanoc and hopefully in others too. 
Keywords: charts|daru|daru-view|data-analysis|data-visualization|graphs|iruby-notebook|nanoc|plot-library|rails|ruby|sinatra