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 2,788,522 websites that are Ruby on Rails Customers. We know of 639,231 live websites using Ruby on Rails and an additional 2,149,291 sites that used Ruby on Rails historically and 440,645 websites in the United States.
Get a list of 2,788,522 websites using Ruby on Rails which includes location information, hosting data, contact details, 639,231 currently live websites and an additional 422,094 domains that redirect to sites in this list. 2,149,291 sites that used this technology previously and 440,645 websites in the United States currently using Ruby on Rails.