
Description: Sassy-validation is a software tool that helps validate CSS stylesheets using SassScript syntax. It can check things like variable definitions, mixin usage, placeholder selectors, and nested CSS rules.
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