iTerm2 is a GPL-licensed terminal emulator for macOS. It was derived from and has mostly supplanted the earlier "iTerm" application. Developed by George Nachman
License: Open Source
iTerm is a simple and lightweight terminal emulator suitable for basic terminal needs, while iTerm2 offers a wealth of advanced features and customization options, making it ideal for power users. The choice between the two largely depends on the user's requirements for functionality and complexity.