VaxTele SIP Server SDK allows software vendors and service providers to develop their own SIP based VoIP Server, IP-PBX, SIP PBX, SIP gateway and IP-Telephony services.
SIP proxy server for Windows, allows make calls between SIP devices. SIP@Home works as traditional SIP proxy server or as full proxy, when all voice data goes through proxy.
SIP SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based dial and receive phone calls feature in your web pages and software applications. It accelerates the development of SIP based soft phone with your own GUI (g
Video VoIP SIP SDK for iPhone is a solution to quickly build VoIP softphone that can dial and receive calls on your computer or add VoIP features into your software.
VoiceXML Gateway for SIP VOIP PSTN TAPI development SDK for interactive telephony apps. High level W3C development platform. Supports text to speech, voice recognition, DTMF tones. Works with SIP based VOIP, Skype, and traditional phone services
SKAIFO is an Outlook Add-In that integrates Skype functionality with Microsoft Outlook. It has full-fledged User Interface inside Outlook so there is no need to switch back and force between Outlook and Skype for your free calling needs.