Trains

• italiarail.com (buy train tickets even from abroad)P
• Trenitalia.com (official Italian rail site)
• Raileurope.com (tickets & railpasses)P
• Trenord.it (Lombardy trains)
• italotreno.it (private high-speed line)
• Rome2rio.com (compare all public transit options)
• Bahn.de (timetables)
• Europetrainsguide.com (general train info)
• Seat61.com (general train info)
• Railfaneurope.net (links)

Rental cars

• Autoeurope.com (consolidator/leases)P
• Rentalcars.com (aggregator)P
• Momondo.com (aggregator)P
• Europebycar.com (rentals/leases)
• Priceline.com (OTA)P
• Carrentals.com (aggregator)P

Coaches (buses)

• Flixbus.com (cheap coaches)P
• Rome2rio.com (compare all public transit options)
• Marinobus.it (cheap coaches)
• Moovitapp.com (public transit options)
• Eurolines.co.uk (Europe-wide)
• BlaBlaBus.com (cheap coaches across Europe)
• Buscenter.travel (cheap coaches)
• Marozzivt.it (long-distance buses in Italy)
• italotreno.it (regional train-to-bus connections)

Airfares

• Skiplagged.com (aggregator)P
• Momondo.com (aggregator)P
• Flyinternational.com (consolidator)P
• Skyscanner.com (aggregator)P
• Hotwire.com (OTA)P
• Google.com/flights (aggregator)
• Hipmunk.com (aggregator)
• CheapOair.com (OTA)P
• Vayama.com (aggregator)P
• Expedia.com (OTA)P

Airports

• Adr.it (Rome (FCO and CIA))
• Milanomalpensa-airport.com (Milan Malpensa (MXP))
• Veniceairport.it (Venice (VCE))
• Trevisoairport.it ("Venice" Treviso (TSF))
• Aeroportodinapoli.it (Naples (NAP))

Public transit

• Tiemmespa.it (connecting S and W Tuscany)
• Ataf.net (Florence to Greve, Impruneta, San Casciano)
• Navigazionelaghi.it (lake ferries on Como, Garda, Maggiore)
• Atv.verona.it (Verona public transit)
• Aziendasicilianatrasporti.it (public buses in Siracusa)
• Aziendasicilianatrasporti.it (coaches in Sicily)
• Amat.pa.it (public transit in Palermo)
• Acvbus.it (Florence to Greve, Barberino Valdelsa, San Casciano)
• Muoversi.regione.lombardia.it (find all public transit in Lombardy)
• Arriva.it (SAIS buses on S & W shores of Garda)
• interbus.it (coaches in Sicily)
• Capautolinee.it (Prato to Impruneta, Strada, and San Casciano)
• Asfautolinee.it (buses along Lake Como's western shore and central triangle (Como-Bellagio and Como-Lecco))
• Trenord.it (regional rail in Lombardy)
• Atv.verona.it (ATV buses on N and E shores of Garda)
• Sab.arriva.it (buses along Lake Como's eastern shore)
• Unicocampania.it (all public transit in Campania)
• Anm.it (Naples public transit)
• Eavsrl.it (Bay of Naples trains/buses)
• Sorrentolift.it (Sorrento beach elevators)
• SITAsudtrasporti.it (regional buses)
• Fsbusitaliacampania.it
• Ctp.na.it (regional Naples buses)
• Atac.roma.it (bus, tram, Metro (subway))
• Romamobilita.it (all public transit, taxi, and driving/parking info)
• Muoversiaroma.it (status of ZTL and Metro)
• Cotralspa.it (Lazio's intercity buses)
• Actv.avmspa.it (vaporetti [public "water buses"]; traghetti (ferries); land buses; public parking)
• Motoscafivenezia.it (water taxis)
• Alilaguna.it (airport ferry)
• Maps.venicexplorer.net (address locator)
• Ataf.net (Florence buses)
• Fipark.com (Florence parking)
• Ztl.comune.fi.it (Florence ZTL traffic zone)
• Gestramvia.com (Florence tramway)
• Fsbusitalia.it (Florence airport bus)
• Tep.pr.it (Parma public transit)
• Pisa.cttnord.it (Pisa public transit)
• Pisamo.it (Pisa driving, ZTL, and parking regs and rates)
• Moovitapp.com (public transit options)
• Atm.it (Milan public transit)
• Tiemmespa.it (Siena public transit)
• Sienaparcheggi.com (Siena parking)
• Umbriamobilita.it (All public transit in Umbria)
• Fsbusitalia.it (public buses in Umbria)
• Fsbusitalia.it (public buses in Tuscany)
• Fsbusitalia.it (public buses in the Veneto)
• Fsbusitalia.it (public buses in Campania)