GNU Screen is a terminal multiplexer, a software application that can be used to multiplex several virtual consoles, allowing a user to access multiple separate login sessions inside a single terminal window, or detach and reattach sessions from a terminal. Developed by Free Software Foundation
License: Open Source
GNU Screen is a simpler, more stable option suited for basic usage and lightweight tasks, while tmux offers advanced features, better user experience, and customization options, making it more suitable for power users and collaborative environments.