Lean Sinatra - This section will help you to find best Sinatra Tutorials & Courses recommended by experts. Sinatra is a free and open source software web application library and domain-specific language written in Ruby. It is an alternative to other Ruby web application frameworks such as Ruby on Rails, Merb, Nitro, and Camping. It is dependent on the Rack web server interface. It is named after musician Frank Sinatra. Here You will find some of the best Sinatra Tutorials, each course has its details like (Video or text, free or paid, beginners or expert level) which helps you to choose the best Sinatra course easily.