1)   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!

 2)   Ekiga 2.0.11
Ekiga's is the market's leading free SIP based softphone available for download.

 3)   kphone 4.2
Kphone's is the market's leading free SIP based softphone available for download.

 4)   Callback-Button(1)(1) VoIP Provider SiPHome
VoIP Surfer X-Lite 3.0 is the market's leading free SIP based softphone available for download.http://www.siphome.de

 5)   Voip Communicator 4.2
Voip 's is the market's leading free SIP based softphone available for download. Based on the advanced architecture of eyeBeam 1.5 (Phoner's carrier grade telephony client), the new Phoner is designed to showcase some of the feature rich capabilities

 6)   Minisip 0.7
Minisip's is the market's leading free SIP based softphone available for download.

 7)   Voip Ekiga Communicator 2.0.11
Ekiga's is the market's leading free SIP based softphone available for download. Based on the advanced architecture of eyeBeam 1.5 (Phoner's carrier grade telephony client), the new Phoner is designed to showcase some of the feature rich capabilities

 8)   ekiga Talk Multimedia Communicator 2.0.11
ekiga's is the market's leading free SIP based softphone available for download.

 9)   Webrequest Callback-Button VoIP-Callbutton
A client clicks on the call-back-button, types in his number, will be called back from the server and at the same time the server calls the website-operator and finally connects them.

 10)   Webrequest Telephonvalidierung VoIP-Webservice
They have a on-line Shop, a forum, a contact stock exchange or a similar Community in the InterNet and place again and again disappointed firmly that people with wrong data announce themselves.