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Our VoIP SIP SDK provides a powerful and highly customizable solution to quickly add SIP based dial and receive phone calls features in your software applications. It accelerates the development of SIP VOIP applications.

Our VoIP SIP SDK provides a powerful and highly customizable solution to quickly add SIP based dial and receive phone calls features in your software applications. It accelerates the development of SIP VOIP applications.

Embedded Windows CE VOIP Developers Kit is your embedded telephony solution for developing software/hardware to enable device to device phone calls using SIP/H323 phone right at the electronics level.

3CX Phone System Free edition is a SIP based IP PBX. Scaleable, eliminates phone wiring and lowers call costs via VOIP providers. Developed for Windows - Easy to install and configure! Download FREE edition with no limitations or time outs.

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

Kphone's is the market's leading free SIP based softphone available for download.

ekiga's is the market's leading free SIP based softphone available for download.

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

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