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 2,685,463 websites that are Ruby on Rails Customers. We know of 846,720 live websites using Ruby on Rails and an additional 1,838,743 sites that used Ruby on Rails historically and 580,439 websites in the United States.
Get a list of 2,685,463 websites using Ruby on Rails which includes location information, hosting data, contact details, 846,720 currently live websites and an additional 578,880 domains that redirect to sites in this list. 1,838,743 sites that used this technology previously and 580,439 websites in the United States currently using Ruby on Rails.