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 5,910,146 websites that are Ruby on Rails Token Customers. We know of 3,907,814 live websites using Ruby on Rails Token and an additional 2,002,332 sites that used Ruby on Rails Token historically and 2,366,563 websites in the United States.
Get a list of 5,910,146 websites using Ruby on Rails Token which includes location information, hosting data, contact details, 3,907,814 currently live websites and an additional 2,329,342 domains that redirect to sites in this list. 2,002,332 sites that used this technology previously and 2,366,563 websites in the United States currently using Ruby on Rails Token.