Net2Phone Comm Center
Net2Phone Comm Center is a freely downloadable Windows software (Windows 95, 98, 2000, ME, NT, XP) that allows you to make and receive phone calls at very low-rates. Net2Phone makes possible both computer-to-computer free calls as well as low-cost calls from your computer to a traditional landline anywhere in the world. Also available a fax and instant messaging facility. To download the software you need first to register on the site.