3CX IP PBX and Software for Windows

3CX Phone System for Windows is a software-based IP PBX that replaces traditional proprietary hardware PBX / PABX. 3CX’s IP PBX has been developed specifically for Microsoft Windows and is based on the SIP standard making it easier.

www.3cx.com

8x8 Inc.

Offers the Packet8 broadband telephone service, consumer videophones, hosted iPBX solutions, and voice and video semiconductors and related software.

www.8x8.com

Jajah IP Telephone Paltform

Make a JAJAH call anywhere on your mobile or landline phone to save money and keep in touch with friends and family.

www.jajah.com

Net to Phone

It is a global provider of full-featured of VoIP telephone service.

www.net2phone.com

Skype - VOIP Calls

Enjoy free international and internet video calls with Skype. Skype provides internet calls, conferences, SMS and international calls online.

www.skype.com

Vocal Tech Communication

Provides voice over broadband, hosted enterprise, national VoIP network and more.

www.vocaltec.com

VoIP Service Provider

XO Communications provides medium and large businesses with VoIP services allowing them to operate smoothly and as fast as possible.

www.xo.com