
Description: ZeroStack is an open source platform that provides serverless infrastructure for developers to build, run and scale applications without managing servers. It offers auto-scaling, built-in monitoring, and simplifies operations.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Citrix Hypervisor is an open-source server virtualization platform that allows you to manage virtual machines, storage, and networking. It is based on Xen hypervisor technology and provides a simple yet powerful toolset for virtual infrastructure.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API