Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity. Note that Ruby on Rails has two detection techniques and this is one of them.
http://www.rubyonrails.org/
Frameworks
Get access to data on 4,177,758 websites that are Ruby on Rails Token Customers. We know of 1,444,781 live websites using Ruby on Rails Token and an additional 2,732,977 sites that used Ruby on Rails Token historically and 691,943 websites in the United States.
Get a list of 4,177,758 websites using Ruby on Rails Token which includes location information, hosting data, contact details, 1,444,781 currently live websites and an additional 1,036,861 domains that redirect to sites in this list. 2,732,977 sites that used this technology previously and 691,943 websites in the United States currently using Ruby on Rails Token.