Recommendation for German-speakers who want the best bicycle routing available:
bikerouter.de
It comes with lots and lots of routing profiles.
My favorite for getting somewhere quickly and safely is “Trekking-Tertiaries”, which ignores the horrible German bike-paths and leads you over quiet back streets that aren’t thoroughfares for car traffic.
You can also customize the routing to your heart’s content if you’re into scripting.
The routes can be exported as GPX tracks to use them anywhere you like.