I am sure you all know about Skype.
But there is another player - and cheaper - in the game. It's called Jajah:
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However, it doesn't accept PayPal payments (which I have) but rather Paysafecard and MoneyBookers (which I have never heard of before).Which means that if I want to use paid Jajah services, I need to open an account with either Paysafecard or MoneyBookers (for various reasons I can't use credit card).
As a buyer, I used PayPal many times and I happy with it. They are pretty reliable - never made "mistakes" of overcharging me.
Anyone had any experience (positive or negative) with Paysafecard and MoneyBookers?
Thanks! Sam