VaxVoIP SIP SDK
VaxVoIP SIP SDK to develop web/soft phone.
VaxVoIP SIP SDK to develop web/soft phone.
MizuPhone -SIP Softphone for Windows
VoIP Tunneling and Encryption
SIP WebPhone
Mizu VoIP Server
MizuPhone -free VoIP softphone for Windows
Doddle is a free online SIP WebPhone
ZOIPER webphone
.Net SDK for VoIP call system development