Have you heard telephone software which can make telephone calls from your pc?
I have heard some for example Global 7,openwengo.
Please tell me if you've heard or used some.
Globe 7 is good, but the free service that they providing is really nonsence. They ask u to watch programs and each hour u watch they will give u a small credit to call to phone in some selected countries. it is a real time waste, u could rather pay the money and make calll, but trust me, most of the countries there are calling cards which are cheaper than internet telephony available, aspecially in singapore it is damn cheap as 8c per minute, which is way too lesser than the local call rate here(which is abt 20c per minute).
Skype is my personal favorite. I also use Ekiga, but I think that is mostly just for linux, but I'm not sure about that.