There’s a great communist rap scene in Germany. They’re mostly affiliated with the (now defunct) Jugendwiderstand, a Maoist youth organization. Here’s a list: Vizzion, Disarstar, Taktikka, Camaro, Delirium/Zynik and a few others I’m forgetting. There is also a small documentary/interview from RT Deutsch with Taktikka and another here.