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
Yakuake (Yet Another Kuake) is a KDE terminal emulator. Its design was inspired from consoles in computer games such as Quake which slide down from the top of the screen when a key is pressed, and slide back up when the key is pressed again. It supports skinning, split viewing, and profiles, as Konsole does. Developed by Eike Hein
License: Open Source
iTerm2 is a powerful, feature-rich terminal emulator for macOS, offering extensive customization and a range of advanced features. In contrast, Yakuake is a lightweight terminal that excels in quick access and integration with the KDE environment but lacks the depth of customization and functionality found in iTerm2.