HEATKEYS

Linphone, Free SIP VOIP client, open-source voip software for Linux, windows, mac, iphone, android. Free sip voip sdk.

HTML5 SIP client using WebRTC framework

The fastest and easiest way to get a SIP account for free video calling over the Internet. Register your SIP address with any VoIP phone or use our free internet phone for secure calling.

The Award Winning Business Phone Service over the Internet. OnSIP business VoIP service is a hosted pbx system that allows you to streamline your business communications. There’s no phone company hassle, no phone system to buy or manage, no contracts

Embedded Software Development for VoIP, DSP, SDR and telecommunication equipment

Kapanga Softphone is the premier SIP software phone integrating voice, video and fax over IP communications in one single application. Kapanga Softphone lets people make phone calls, video calls and send and receive fax while connected to a Voice ove...

Engage, Collaborate, Co-Create and Share your knowledge by asking and answering questions in the discussion forums, commenting on blogs, rating videos, and sharing tips and advice in the wiki-style documents on configuring, troubleshooting, and desig...