
Description: Plunker is an online community for creating, collaborating on and sharing web development projects. It provides an online code editor and preview that allows developers to easily build web apps, web sites, JavaScript apps, etc. without any setup or hosting required.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: StackBlitz is an online IDE for web applications that allows users to quickly create, edit, and share projects. It supports popular frameworks like React, Angular, and Vue.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API