SVS.NET Web Services

Cahoots - Free PC-to-PC voice program with built-in contacts list. Also allows contact of other users at any website, and sharing "webtours".
DeltaThree - PC to Phone services, web-based e-mail with voicemail and fax capabilities.
Dialpad - Unlimited free long distance calls to US phones. Also free PC to PC call service.
Go2Call.com - Internet phone service offering low-cost PC-to-phone calls and international calling plans.
Graphnet - Internet-based voice transmission.
Hottelephone - Make free phone calls to any ordinary land-phone in over 30 countries.
Net.Caller - Rudimentary PC to Phone communications tool.
Net2Phone - Voice calls from your PC to any phone.
Netscape Call Conference Center - Internet-launched conference calling.
Paramax - Free internet telephony software.
PhoneFree - Windows-only PC-to-phone offering.
Poptel - Free calls to phones in several countries. Coverage depends on sponsor's partnership.
QTalka - Small PC-to-PC voice program, especially for ICQ users. Free trial version - US$12 for full version.
TalkNation - Free PC-to-PC voice program.
TrulyGlobal Internet Phone - Free PC-to-PC voice program, with built-in Contacts List.