Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity.
http://www.rubyonrails.org/
Frameworks · Programming Language
Get access to data on 2,729,153 websites that are Ruby on Rails Customers. We know of 963,758 live websites using Ruby on Rails and an additional 1,765,395 sites that used Ruby on Rails historically and 660,818 websites in the United States.
Get a list of 2,729,153 websites using Ruby on Rails which includes location information, hosting data, contact details, 963,758 currently live websites and an additional 645,974 domains that redirect to sites in this list. 1,765,395 sites that used this technology previously and 660,818 websites in the United States currently using Ruby on Rails.