1)   3CX VOIP Phone for Windows 6.0
Free VOIP / SIP phone (softphone). Use your PC as a phone. Works with any SIP / VOIP provider and phone service. Easy to use interface to transfer, forward calls or review history of calls. Free download from http://www.3cx.com

 2)   PeerMe 0.9.6
PeerMe has developed an instant messaging platform which supports Peer to Peer Voice, PC to PC and PC to handheld voice communications, instant messaging, and peer-to-peer file transfer all over public Internet connections.

 3)   Globe7 8.0.0.1
Globe7 is a tiny application integrated with Soft Phone, IM, Videos, Games, News and many more opt-in widgets like Live TV, Live Radio, Astrology, Forex, Movies, Pets, Recipes, Sports for your complete entertainment, information and communication.

 4)   Free Internet Phone 3.0
Globe7 is a free downloadable software integrated with Video phone, IM, & Real time video streaming, powered by online advertising. Globe7 enables you to make free calls from pc to pc, pc to mobile & pc to landline by watching videos in Globe7 TV.

 5)   ZOIPER Free SIP and IAX softphone 2.14
ZOIPER 2.0 Free Edition is a user-friendly IAX and SIP softphone compatible with the Asterisk platform or any other IAX or SIP capable system. ZOIPER Free . Find out the many advantages of this FREE product from Attractel!

 6)   Best Phone 2.0.0.0
Best Phone is a free downloadable soft phone which enables you to make calls from pc to pc, pc to mobile and pc to landline. Best Pho offers you a free phone number to make free pc to pc calls and receive unlimited free incoming calls from any phone.

 7)   FREE PHONE 2.0.0.0
FREE Phone is a free downloadable soft phone which enables you to make calls from pc to pc, pc to mobile and pc to landline. FREE Phone offers you a free phone number to make free pc to pc calls and receive unlimited free incoming calls from any phone.

 8)   Zoiper Communicator 1.10
ZOIPER Communicator is a very intuitive SIP softphone, with presence, chat, video and fax. Very stable, small footprint, skinnable, and with encryption support.

 9)   H323 VoIP SDK 1.0
The Abto LLC VoIP H.323 SDK contains a high performance VoIP conferencing client capable of delivering crystal clear sound even for both low and high-bandwidth users and H.323 compatible devices (hardware and software).

 10)   Zoiper Web Softphone 1.10
ZOIPER WEB - the first SIP and IAX WEB-based softphone, allows website visitors and web application users to make VoIP calls straight from browser: Internet Explorer, Firefox, Safari, Google Chrome on Windows