i am in university and i have a mbp that i have recently purchased during the summer. my family back home uses all windows. i was wondering if there is sometrhing like skype that would allow us to communicate over the internet. i know skype is free to download but after the first 10 minutes, it costs very little but i would rather not have to go tthrough the hastle of billing and filling in credit card information, is tehre any other alternate 100% free method? thanks