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The Ruby programming language has many useful frameworks that help build web applications. Ruby on Rails is not the only one. There are many other frameworks that are used by developers. Among them you will definitely find Sinatra, Padrino, Hanami and Cuba.
This is the most popular open source framework for Ruby, which is used to quickly create web applications. Ruby on Rails was created using the MVC (Model – View – Controller) architecture. It stands out due to simplicity, speed and pleasure of writing code and is characterized by the DRY and Convention Over Configuration rules. The first one is used to avoid repeating a code in the same places, which affects the speed of the developer’s work. In contrast, the COC rule is responsible for minimizing necessary configurations by replacing them with ready-made patterns. 
Ruby on Rails is just what you need to create web applications. Usually, the time you will spend on work is relatively shorter than in case of the other programming languages. Ruby on Rails allows you to use plugins that extend your web application with new functions. This framework is extremely popular in development of e-commerce platform software. AirBnB, Groupon and Basecamp are among the most popular ones.
May be used as an alternative to other known Ruby frameworks – above all, to Ruby on Rails. Sinatra is also used to create web applications. It depends on the interface of the Rack network server. It is not based on the MVC model, which differs this framework from the abovementioned Ruby on Rails. Sinatra is based on the general principle of fast application development while maintaining the minimum effort. Developers can use this framework as an open library of web applications. Sinatra is programmed in the Domain Specific Language. It has been used in the development of products for such brands as Apple, BBC, LinkedIn and GitHub.
It was created in 2010 as an open – source web framework based on another framework – Sinatra. Same as the previous one, it depends on the interface of the Rack network server. Padrino is primarily intended for mounting many applications. It is characterized by a simple and light construction. This framework accelerates the creation of custom web applications. With the use of it, developers can work with many tests and database libraries.
Hanami consists of simple and small Ruby libraries. The main advantage of this framework is to simplify the creation of custom web applications. This is done by forcing an appropriate code structure and delivering ready-made libraries. The aim of the Hanami authors was to develop a framework for creating web applications that uses less memory than other Ruby frameworks. Hanami is built on the principle of separation in the file structure – between what happens in the front-end and back-end.
Cuba is a Ruby micro framework for web development. It is light, small and fast. Like other frameworks, it allows you to speed up the creation of custom applications. It can be extended by integration of templates and test libraries. Using Tilt, it integrates many templates with each other, and thanks to Cutest and Capybara, it enables testing.
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