要想用pc2phone的可以試試這個,應該是免費的

http://www.voipbuster.com/en/index.html

打到這些國家都是免費的

Australia
Austria
Belgium
Canada
China
Czech Republic
Denmark
Finland
France
Germany
Greece
Hungary
Ireland
Israel
Italy
Luxembourg
Netherlands
Norway
Poland
Portugal
Spain
Sweden
Switzerland
Taiwan
United Kingdom
United States

不注冊隻能打1分鍾，注冊以後買1歐元的credit就不限時了

自己也沒有真正用過，大家先看清各項說明

http://www.voipbuster.com/en/faq.html