
Description: NX is an open source toolkit for enterprise Angular applications. It provides an CLI, generators, libraries and plugins to help developers quickly build large scale apps with Angular, NestJS, Express and more. Key features include file system based routing, mono-repo support, powerful generators and integrations.
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