RhythmCat is described as 'Music player which can be running under Linux. It can be used as a normal music player, and it can also show lyrics in a single window, or even on the desktop. It can help you mix your voice into the original music' and is a Audio Player in the audio & music category. There are more than 50 alternatives to RhythmCat for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best RhythmCat alternative is foobar2000. It's not free, so if you're looking for a free alternative, you could try foobar2000 or AIMP. Other great apps like RhythmCat are Winamp, Audacious, Strawberry and Amarok.