Make FREE pc-to-pc and pc-to-phone calls over Internet and ISDN/PSTN. PC-Telephone is a powerful communications software that enables you to exploit the full communications potential of the Internet and public telephone networks ISDN/PSTN. PC-Telephone makes possible to use your computer as internet telephone, ISDN phone, answer phone, fax software, voicemail client and more.

Make voice calls from any PC in the world. Free voice connectivity with Internet users. RinGo allows you to make calls from any place in the world from your PC without the use of PSTN (traditional telephony provider) for local and international calls