VaxSoft

VaxVoIP SIP Server SDK
Trial versionDevelop SIP based VoIP server for IVR, IP telephony, and call centers.
Windows
VaxVoIP WebPhone SDK
Trial versionBuild Branded SIP Webphones Easily with This SDK
WindowsVaxVoIP SIP Desktop SDK
Trial versionDevelop SIP based VoIP softphone, and IVR systems.
WindowsVaxPhone - Softphone (Voice Changer & Phone Calls)
FreeVaxPhone is a SIP based softphone to dial and receive internet phone calls by using ANY ITSP (Internet Telephony service provider).
iOS