
Description: Project Sandcastle is an open source app that allows you to install Android on certain mobile devices that originally ran other operating systems. It gives new life to older phones by letting you use Android instead.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Sailfish OS is a Linux-based mobile operating system developed by Jolla. It is designed to be secure, privacy-focused, customizable, and compatible with Android apps.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API