First, double-check that all your appliances are marked "110-220V AC 50-60Hz". If they are not 220V, you need a voltage converter or you will fry them. But most appliances are dual voltage.
If you have 2-pin only appliances you need a 2-pin plug adaptor, to convert to the European system of 2 round pins (sometimes called a "Europlug") Just like the previous poster said: http://ecx.images-amazon.com/images/I/41j9au5TJcL.jpg
If your appliance has a 3-pin plug (if it needs an earth connection), then you need a 3-pin plug adapter. These are unfortunately different for France and Italy, so you will need two, one for each country.
An Italian plug looks like this: http://upload.wikimedia.org/wikipedia/commons/c/c1/Ita_plug_16A_10A.jpg
The third earth pin is between the other two pins.
A French plug looks like this: http://upload.wikimedia.org/wikipedia/commons/5/5d/CEE_7-7.jpg
and a French socket looks like this: http://upload.wikimedia.org/wikipedia/commons/3/3b/French-power-socket.jpg
The earth is a pin, coming out of the socket and going into the plug.
To repeat, the same 2-pin plug works in both types of sockets.