iCall Free VoIP
iCall lets you make and receive free or low cost phone calls on your Mac, PC computer, iPhone, or iPod Touch.

Free Skype internet calls and cheap calls to phones online - Skype
Make internet calls for free with Skype. Call friends and family on any phone with Pay As You Go and Pay Monthly subscriptions, sign up today at Skype.com.

5 Ways to Make Free Internet Phone Calls
Most of the free phone call applications I list below are PC to phone programs, meaning you can make a free call from your computer to a real telephone number .

Make and receive calls in Gmail | Google Voice Blog
Aug 25, 2010 . Google Voice lets you manage all your phone communications and . Wouldn't it be great if you could use your computer to make or receive calls? . To make a call, just click the Call phone link in Gmail and enter any number .

Yahoo! Voice - Make Free and Low Cost Calls From Your PC
Make free PC-to-PC calls worldwide and call regular and mobile phones for as low as 1 a minute. Get a Phone In number to receive calls on your PC.

PC to Phone Calls From Rebtel
Do you want to make phone calls straight from your computer? Tired of paying Skype's expensive connection fees? Check out Rebtel's PC to Phone calls!