
Description: Variable Grid System is an open-source, flexible grid framework for responsive web design. It allows developers to build fluid grid layouts that adapt to any screen size or device. The system uses Sass variables to customize column counts, gutter widths, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Purecss is an open-source CSS framework that provides lightweight styles and layout options for quickly building responsive web pages. It focuses on modular, customizable components without excess code.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API