
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: Topcoat is an open-source CSS library created by Adobe to provide lightweight, reusable components for interface design. It offers a range of UI elements like buttons, menus, icons, etc. to help developers quickly build web apps with clean, minimalist design. Topcoat simplifies front-end development and aims to speed up the process.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API