An open source communications platform, Asterisk® is a complete IP PBX in software. It runs on a wide variety of operating systems including Linux, Mac OS X, OpenBSD, FreeBSD and Sun Solaris and provides all of the features you would expect...
With Skype you can make free calls over the internet to other people on Skype for as long as you like, to wherever you like. It is free to download. You can also call landlines and mobiles at great rates.
3CX VOIP Phone System for Windows - provides an easy to use, plug and play SIP - IP PBX. Download the FREE edition today and break free from your proprietary phone system!
Vonage is a leading provider of VoIP internet broadband telephone services. Vonage offers VoIP calling plans to home, residential and business customers who wish to have unlimited long distance with cheap international calling rates.
Digium is an Open Source telecommunications supplier. We are the primary corporate sponsor of the Asterisk Open Source PBX and offer a variety of specifically designed low and high density telephony hardware and professional services relate...