Every six months or so I find myself looking for multi-stop routing/planning in 
#OpenStreetMap and wonder why the main OSM instance does not support this.
So, let me remind myself. This works: https://routing.openstreetmap.de/
And for drawing on maps I found uMap useful: https://umap.openstreetmap.fr/
@Fabian For Android, OsmAnd supports multiple waypoints for routing and while the UX setting it up leaves some things to desire, it works really well mostly.
@jaywink I know, but thanks. Btw, I really like Organic Maps as a more lean client on Android https://organicmaps.app/
@Fabian Yeah Organic Maps is pretty and sleek. I just found it misses quite a bit in the end, and reverted back to OsmAnd for now at least. Mainly for the navigation being much richer.
@jaywink I'm mostly using it for walking distances and quick neighborhood checks. I think for driving over large distances I've also used OsmAnd last vacation.
@Fabian Oo nice, need to check those out 👍