We at AnyChart JS Charts (http://www.anychart.com) have just released a
series of 20+ integration templates to help web developers add
interactive charts, maps and dashboards to HTML5 apps quicker, with no
regard to what technology stack is used.
In particular, now there is a template for Ruby, Sinatra and MySQL in
the collection, distributed under the Apache 2.0 License and forkable on
All technical integrations, just in case:
Check that out if you are interested, and ask your questions if any.