
Description: GNU Screen is a terminal multiplexer that allows a user to access multiple separate terminal sessions inside a single terminal window or remote SSH session. It enables switching between multiple programs in one terminal, detach them and reattach them to a different terminal, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Zellij is an open-source terminal workspace and multiplexer, allowing you to tile terminal windows and panes in flexible configurations. It aims to be lightweight, customizable and optimize workflows.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API