
Description: Metro UI CSS is a free front-end framework for developers to create websites and apps with a Windows 8 Metro user interface style. It includes CSS/LESS styles, fonts, and JavaScript components like tiles, tabs, accordions and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Material UI is an open-source React component library that implements Google's Material Design. It provides developers with reusable UI components to help build user interfaces more efficiently.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API