
Description: Atoms.js is an open-source JavaScript library for building user interfaces. It allows you to break UI components down into small, reusable building blocks called 'atoms' to construct interfaces. Useful for rapidly prototyping and building modular UIs.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Polymer is an open-source JavaScript library for building web applications using Web Components. It allows developers to create custom, reusable HTML elements with encapsulated functionality and styles.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API