Lonely Planet. Up to date information on where to sleep, eat and shop in Rome.
Rome Airport. Interactive maps and other airport, airline and travel information.
Trenitalia. The site for online train reservations in Italy, city-to-city tickets, Eurail Italy pass, and cross-border trains.
RomeGuide. Good information on what's on in Rome – theatre, arts, music, cinema, and sport.
Romaturismo.com. This is the official site of Azienda di Promozione Turistica di Roma (Rome Tourist Board). Everything from accommodation and restaurants to recipes and a talking Roman dialect dictionary.
What's on in Rome.Opera, cinema, theatre, art, photography, and things to do.