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 2,713,141 websites that are Ruby on Rails Customers. We know of 930,833 live websites using Ruby on Rails and an additional 1,782,308 sites that used Ruby on Rails historically and 632,681 websites in the United States.
Get a list of 2,713,141 websites using Ruby on Rails which includes location information, hosting data, contact details, 930,833 currently live websites and an additional 631,071 domains that redirect to sites in this list. 1,782,308 sites that used this technology previously and 632,681 websites in the United States currently using Ruby on Rails.