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3.graphhopper / graphhopperOpen source routing engine for OpenStreetMap. Use it as Java library or standalone web server.openstreetmapjavageospatialdijkstradirectionsrouting-engine+7 moreJavaAPACHE-2.06.8K total2K forks+358 starsfrom 6,396 · score 5.88
4.opentripplanner / OpenTripPlannerAn open source multi-modal trip plannerJavaOther license2.8K total1.2K forks+158 starsfrom 2,610 · score 5.07