VoIP SIP Client SDK - A powerful and highly versatile VoIP SDK. Our SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications.

Softphone SDK, SIP SDK, VOIP SDK, Softphone, IVR SDK, IMS SDK. Our SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications.

SIP Softphone ActiveX - A powerful and highly versatile VoIP SDK. Our SIP Softphone ActiveX provides a powerful and highly versatile solution to add quickly SIP based dial and receive phone calls features in your software applications.

Net-Iden automatically dials your application user's telephone number at the same time that they are performing a transaction on your application. For web users.

4PSA VoipNow Express is a free, fully functional Linux IP PBX software, limited to ten phone extensions, used for hosted VoIP PBX services or in-house IP softswitch. Easy upgrade to full featured multi-tenant Professional edition.

VaxVoIP SIP SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based IP-Telephony make and receive phone calls feature in your web pages and software applications. You can easily develope net-to-phone apps&web pages.