Estate Romana
Search for events in Rome by category or period.
http://www.estateromana.comune.roma.it/

Le Cool
Free, weekly local events guide that is delivered direct to your email box. In Italian only.
http://www.lecool.com/roma/

Roma Turismo.com
Just click on "Events in Rome" to find out what is currently happening in the city.
http://www.romaturismo.com/

Romace
Local entertainment listings. In Italian only.
http://romace.sfconsi.com/

Rome Young
Online guide to current exhibitions, theatre, music and photography in Rome.
http://www.romeyoung.com/english/index.htm

Select Italy
Search for and book tickets to musical and cultural events nationwide.
http://selectitaly.com/

Wanted in Rome
Find out more about what is going on in Rome at this listings site.
http://www.wantedinrome.com/events/index.php

What's On in Rome
Local events guide.
http://www.whatsoninrome.com/

What's On When
Tells you what is worth catching in cities all over the world including the Rome.
http://www.whatsonwhen.com/

World Guides
A month-by-month guide to festivals and events in the Italian capital.
http://www.rome.world-guides.com/events.html