Activitaly
Hosts an interactive map of Rome which highlights major tourist attractions in the city.
http://www.activitaly.it/infobase/index.php?lang=en

Alfanet
Plan your route using this interactive map of Rome and its suburbs.
http://www.alfanet.it/Mappadiroma/default.html

Alfanet
Search for the bus or street you need.
http://www.alfanet.it/welcomeitaly/roma/bus_metro/default.html

Bed & Breakfast Roma
Download a variety of Rome maps at this site, including ones related to the city's transport network.
http://www.bedroma.com/mappe/map_consulta.asp

Capotilium.org
Contains a detailed colour map of the Rome's Imperial Forum.
http://www.capitolium.org/eng/fori/pianta.htm

Hot-Maps
Excellent zoomable map of Rome.
http://www.hot-maps.de/europe/italy/rome/homede.html

Italy Cyberguide.com
Suburban map of the city.
http://www.italycyberguide.com/Geography/cities/rome2000/map-ns.htm

Le Chiavi del Mondo
Useful interactive map of Rome.
http://www.lechiavidelmondo.it/indexmap.htm

Living In Rome
Interactive tourist map of Rome and its major sights.
http://www.livinginrome.com/info/rome-map-english.php

Map of Rome
Zoomable map of greater Rome.
http://members.tripod.com/pahoahi/italy/romemap/

Maps of the Roman Empire
As the title states.
http://www.dalton.org/groups/rome/RMAPS.html

Roma 2000
Interactive map of Rome aimed at tourists.
http://www.roma2000.it/zmappe.htm

Roma Matic
Interactive map of the ring road that encircles Rome, known as the Grande Raccordo Anulare.
http://www.roma-o-matic.com/gra_en.php3

Roma Matic
Search for streets, taxi stands, Internet cafes, pharmacies, monuments, hotels, post offices, cinemas and a whole lot more using this interactive map of Rome.
http://www.roma-o-matic.com/home_en.php3

Roman Homes
Interactive map of central Rome.
http://www.romanhomes.com/map/

Romaturismo.it
An interactive map of Rome that gets you right down to street level.
http://www.geonext.it/romaturismo/popup_roma_en.jsp

Rome Buddy
Detailed map of the Rome metropolitan area.
http://www.romepost.com/

Rome Map
An interactive map that highlights major tourist attractions in Rome.
http://www.aviewoncities.com/rome/romemap.htm

Stuardt Clarke's Rome
Links to various maps of Rome including ones of the Vatican and the airport.
http://www.stuardtclarkesrome.com/maps.htm