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
ConEmu is a versatile terminal emulator for Windows, offering extensive customization and support for multiple console types, while iTerm2 is a powerful terminal for macOS, optimized for performance and developer productivity. The choice between them largely depends on the operating system and specific user needs.