http://www.skype.com/

http://www.skype.com/ - right you download the program, which is a 5mb download, it lets you do 'voice over ip' basically call other people up who use the thing for free over the internet, you just need a mic and some speakers attached to your computer. so basically 100% free phone calls assuming that other people use the thing, and assuming that your internet is flat rate. also, you can call real phone numbers and pay 1.1p per minute to most places on the planet, eg New Zealand, London, America etc. (even Nelson!) gettit! just search for my name and you should find me.