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 2,917,171 websites that are Ruby on Rails Customers. We know of 758,927 live websites using Ruby on Rails and an additional 2,158,244 sites that used Ruby on Rails historically and 529,619 websites in the United States.
Get a list of 2,917,171 websites using Ruby on Rails which includes location information, hosting data, contact details, 758,927 currently live websites and an additional 419,918 domains that redirect to sites in this list. 2,158,244 sites that used this technology previously and 529,619 websites in the United States currently using Ruby on Rails.