Prefer clicking to typing? HashGarten is the GUI for Jacksum, and the File Browser Integration brings both into Finder, Windows Explorer and many Linux file managers (Nautilus, Dolphin, Thunar, …).
New in the docs: a cookbook of use cases and a guide on choosing the right algorithm out of 586 – in English and German.
Source: https://github.com/jonelo/jacksum
GUI: https://github.com/jonelo/HashGarten