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SIP 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.

Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free.

SiSky-Connect SIP to Skype Network Solution

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.

Free VOIP / SIP phone (softphone). Use your PC as a phone. Works with any SIP / VOIP provider and phone service. Easy to use interface to transfer, forward calls or review history of calls. Free download from http://www.3cx.com

Develop secure, AI-powered VoIP solutions using VaxVoIP SIP Server SDK. Build IP-PBX systems, auto dialers, IVRs, multilingual voice agents, and VoIP call centers with real-time PCM access for AI integration.

Carousel is software to connect VoIP calls to ordinary telephone lines and vice versa using one of a number of professional telephony devices. It works as a virtual FXO gateway.

Войсофон - бесплатная программа (софтфон) для звонков через Интернет на стационарные и мобильные телефоны по России и всему миру.

"Monitoring The Web" - это простой, эффективный и полезный сервис для мониторинга интернет ресурсов по протоколам HTTP, HTTPS, FTP, PING, VoIP (SIP).

Express Talk is software that works like a telephone to let you make calls on your Mac OS X. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free.