Scribl.js is a Canvas-based graphics library that easily generates biological visuals of genomic regions,alignments, and assembly data. Scribl can also be used in conventional offline pipelines, since everything needed to generate charts can be contained in a single html file.
Please see http://chmille4.github.com/Scribl/ for more information
Add the following to your gemfile:
//= require scribl
Enjoy using scribl-rails!