
Description: Sails.js is an open-source web application framework for Node.js that follows the MVC pattern. It helps developers build custom web apps and APIs with features like easy ORM, helpers for common tasks, convention over configuration, WebSocket support, efficient scalability and more.
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