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 2,742,609 websites that are Ruby on Rails Customers. We know of 718,083 live websites using Ruby on Rails and an additional 2,024,526 sites that used Ruby on Rails historically and 494,798 websites in the United States.
Get a list of 2,742,609 websites using Ruby on Rails which includes location information, hosting data, contact details, 718,083 currently live websites and an additional 475,412 domains that redirect to sites in this list. 2,024,526 sites that used this technology previously and 494,798 websites in the United States currently using Ruby on Rails.