K3b is described as 'CD and DVD authoring application for the KDE desktop environment for Unix-like computer operating systems. It provides a graphical user interface to perform most CD/DVD burning tasks like creating an Audio CD from a set of audio files or copying a CD/DVD, as well as' and is a very popular Disc Burner in the cd/dvd tools category. There are more than 50 alternatives to K3b for a variety of platforms, including Windows, Linux, Mac, BSD and Flathub apps. The best K3b alternative is ImgBurn. It's not free, so if you're looking for a free alternative, you could try ImgBurn or DAEMON Tools. Other great apps like K3b are InfraRecorder, Brasero, UltraISO and Nero Burning ROM.