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 2,732,464 websites that are Ruby on Rails Customers. We know of 947,596 live websites using Ruby on Rails and an additional 1,784,868 sites that used Ruby on Rails historically and 643,470 websites in the United States.
Get a list of 2,732,464 websites using Ruby on Rails which includes location information, hosting data, contact details, 947,596 currently live websites and an additional 642,158 domains that redirect to sites in this list. 1,784,868 sites that used this technology previously and 643,470 websites in the United States currently using Ruby on Rails.