Grails is an open-source web app framework
Grails is an open-source web app framework which uses Apache Groovy as its programming language. As such, it is essentially based on the Java platform. Nestack Grails offshore Development aims to be a high-productivity framework which follows the "coding by convention" paradigm. As a result, Grails is a stand-alone development environment which hides a lot of the configuration detail from developers.