Evol is a street artist who works primarily in Berlin, his pieces are very clever with electricity boxes and street furniture sprayed to resemble blocks of flats.
I love the work of Neozoon which appear (just read the first entry in German) to be a three piece art collective based in Berlin. They use reclaimed fur coats and cut them into animal silhouettes, simple but very effective.
Just found the work of Julia Schonlau (also known as Juju's Delivery). She is based in Berlin and has a really friendly, warm style of illustration which often hides a slightly darker message.