3CX VOIP Phone for Windows
Free VOIP / SIP phone. Use your PC as a phone. Works with any SIP/ VOIP provider/ phone service. Easy to use interface to transfer, forward calls or set-up conference calls. Free download from http://www.3cx.com more info download

VSoft3
VSoft features includes free VoIP to VoIP call (PC to PC), free video call, low cost VoIP to home/mobile call, send SMS, confrence, SMS to call, VoIP bridge. It is free to download and easy to install. more info download

Firefly VoIP softphone internet phone
Freshtel is introducing a new way of using your Internet connection to call other people, both online and by phone or mobile phone. more info download

Vphonet
Vphonet is a SIP based VoIP soft phone that offers free calling between computers and low-cost calling to regular telephones. Video conferences, video e-malis, calls forwarding, voice mail, SMS worldwilde, file transfer, chat are also available. more info download

VOIP Phone Buddy for SKYPE
VOIP Phone Buddy for Skype adds automatic telephone dialling to almost any windows application, using SKYPE and Jajah VOIP telephony, including Microsoft CRM, Microsoft, Access, Microsoft Outlook, Goldmine, ACT, other CRM and Accounts packages etc. more info download

PC-Telephone
Make FREE pc-to-pc and cheap pc-to-phone, pc-to-fax, phone-to-pc, fax-to-pc calls over Internet or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, ISDN phone, answer phone, fax, voicemail, callerID, etc. more info download

Buzzfon p2p
Download Buzzfon now, a new technological voip breakthrough that will enable you to make free, unlimited pc to pc, pc to phone, phone to pc and phone to phone calls worldwide! The clearest calls possible! more info download

VOIP H323 Phone SDK
VOIP H323 DLL Soft Phone SDK brings H.323 protocol support for ActiveX. With this SDK one can create a simple program to connect and start speaking with anyone with a direct IP Address or use the Gateway or the Gatekeeper to connect to /or from... more info download

Twilight Utilities Skype Forwarder
Skype to phone and phone to Skype. Never miss a Skype call again. Skype Forwarder acts as both a phone and a Skype answering machine as well as a Skype to phone gateway. Use your cell phone to make and receive Skype calls. more info download

AdminsParadise Voip PBX and FAX
Free Enterprise Class VoIP PBX and Fax server. Features Asterisk and Hylafax more info download