Free Skype
Skype customers could call other Skype customers anywhere in the world for free, or to make calls worldwide for very cheap. Hot on the heels of AOL's AIM Phoneline Plan which gives you a free phone number to recieve calls (to your computer), Skype has gone one step further and is now allowing customers within the US & Canada to call to landlines within Canada and the US for Free!!! (via their original Skypeout feature)
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