alternative to google maps

[fwolfst]

As far as I understand the plugin, so far only Google services can be used. I think that with OpenStreetmap and e.g. leaflet (https://wiki.openstreetmap.org/wiki/Leaflet) we have a proper alternative which is in public hands. How hard is it to implement this as an alternative? Unfortunately, I miss a bit of knowledge (and budget) to push this very far.