VaxVoIP SIP SDK
VaxVoIP SIP SDK to develop web/soft phone.
VaxVoIP SIP SDK to develop web/soft phone.
ZOIPER Free IAX / IAX2 and SIP softphone
MizuPhone -SIP Softphone for Windows
SIP Softphone ActiveX
Softphone SDK, SIP SDK, VOIP SDK, Softphone
Enigma is a free Session Initiation Protocol
Mizu VoIP Server
MizuPhone -free VoIP softphone for Windows
.Net SDK for C# SIP WPF softphone development
SIP SDK to develop softphone with call record