
Description: Headless UI is an unstyled, fully accessible UI component library for React. It provides composable UI building blocks without any built-in styles, allowing developers to style components to match their product design system.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Bulma is an open source CSS framework that provides ready-to-use frontend components that you can easily combine to build responsive web interfaces. Its design is based on Flexbox and it aims to provide an alternative to Bootstrap.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API