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 2,378,323 websites that are Ruby on Rails Customers. We know of 523,339 live websites using Ruby on Rails and an additional 1,854,984 sites that used Ruby on Rails historically and 349,327 websites in the United States.
Get a list of 2,378,323 websites using Ruby on Rails which includes location information, hosting data, contact details, 523,339 currently live websites and an additional 391,757 domains that redirect to sites in this list. 1,854,984 sites that used this technology previously and 349,327 websites in the United States currently using Ruby on Rails.