I have tested a new VoIP/Callthroughservice from germany.
They manage their system, like an electronic calling card. (german: Telefonkarte)
Their rates are very low and they have a lot of great extras.
(Even when the design of that page looks like crap)
http://www.dcalling.de/Rates:
http://www.dcalling.com/Pricelist.htmlRegards,
Dr.P.