Grails

Grails is a fiercely agile, highly robust, and deeply respected platform that brought the "Rapid Application Development (RAD)" philosophy of Ruby on Rails to the massive Java ecosystem. Built primarily on the Groovy programming language (a dynamic language that runs perfectly on the JVM and is 100% compatible with Java), Grails is engineered for absolute speed of delivery. The absolute core differentiator of Grails is its "Convention over Configuration and Groovy Agility." While Spring Boot eventually adopted many of these ideas, Grails pioneered them. A developer can type a single command line prompt, and Grails will instantly generate a full database model, the HTML views, and the routing controllers (Scaffolding). Groovy's dynamic syntax allows developers to write code much faster than traditional, verbose Java. Because it offers the blistering development speed of a startup framework while seamlessly allowing the use of any massive legacy Java library (like Hibernate or Spring), it is highly favored by agile teams needing to quickly build robust corporate applications.