Clockwork Micro — free resource available at clockworkmicro.com
Foursquare — free resource available at developer.foursquare.com
developer.foursquare.com
Visit geoapify.com — free resource available at geoapify.com
geocod.io — free resource available at geocod.io
geocodify.com — free resource available at geocodify.com
geojs.io — free resource available at geojs.io
Geokeo api — free resource available at geokeo.com
graphhopper.com — free resource available at graphhopper.com
here — free resource available at developer.here.com
ipstack — free resource available at ipstack.com
LatLng — free resource available at latlng.work
locationiq.com — free resource available at locationiq.com
mapbox.com — free resource available at mapbox.com
maps.stamen.com — free resource available at maps.stamen.com
maptiler.com — free resource available at maptiler.com
nominatim.org — free resource available at nominatim.org