The best public APIs for Routing
6 free APIs tagged #routing.
GraphHopper API
The Open Source Routing Engine API
HERE API
Connect with the world with location-based technologies
MapQuest API
The MapQuest API puts the world in your hands.
Navitia
The open API for urban transportation
OpenRouteService
An Open Source Routing and Matching Platform
Yandex Maps Geocoder
Locating people & places fast and easy