
Description: ZK is a lightweight Java framework for building AJAX-based web applications. It uses a simple XML-like language to bind UI components to data models allowing rapid application development.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: The Vaadin Framework is a Java framework for building modern web applications. It provides components and tools to create interactive web UIs and follow web development best practices.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API