
Description: TempleOS is an open source operating system developed by Terry A. Davis starting in 2003. It is designed to be an old-school, 16-bit operating system built from scratch with Biblical references and built-in support for coding in HolyC, a C/C++ variant.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mezzano is an open-source operating system that aims to recreate the functionality, APIs, and overall feel of 16-bit operating systems from the 1990s like MS-DOS or Windows 95/98. It runs on modern 64-bit CPUs and provides both a text-based interface and basic GUI.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API