I have had an international visitor come to my place recently who during conversation mentioned being able to call to Italy land lines for free (100 minutes per month limit)

This is a Service / Smartphone Application from Indoona, see link below.



At the moment I am looking for any other services like Indoona particularly for making free calls to France, ... free to mobiles would also be a bonus.
I think VoIPBuster is another service like Indoona... but I will need to check this one out further as a request for money or credit card etc is part of registration (unlike Indoona which did not have this)

Does anyone know of other services out there that gives you free international calls to real (land line or mobile) telephone user end points?