
Description: The Play Framework is an open-source web application framework that follows the model–view–controller architectural pattern. It is written in Scala and Java and allows rapid application development by using convention over configuration, hot code reloading and display of compilation errors in the browser.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Grails is an open source web application framework that utilizes the Groovy programming language and the Java platform. It provides a convention-over-configuration, rapid application development environment for building web apps.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API