OSRM
project-osrm.orgHigh-performance open-source routing engine
Eclipse SUMO is open-source microscopic traffic simulation. Here are 14 other tools that do a similar job, 3 of them free or open source.
Macroscopic transport planning and travel demand modelling
Free routing, isochrones and matrix API on OpenStreetMap
Maps, search, routing and traffic APIs from TomTom
High-performance open-source routing engine
Transit and street planning platform
Transportation analytics from big mobility data
Conceptual design for infrastructure in real-world context
Accessibility analysis for transit and land use scenarios
Land use and real estate market simulation for regions
Traffic modelling from macro to micro simulation
Routing engine and route optimization API
Aggregated public transit data from thousands of agencies