Trenitalia - Italy train services official app
Citymapper - The ultimate transport app - iPhone / Android / Web.
TripIt - TripIt is a travel app that creates a master itinerary to organize all of your plans for your vacation or work trip in one spot.
Tickey - Buy tickets for public transport with your smartphone
Öffi - Öffi - your public transportation companion!
Uber Transit - Uber now offers real time data for public transportation