HEATKEYS

Free Zoiper softphone, Web Phone & SDK for windows, mac, linux & mobile phones. Get your own OEM branded and customized softphone. Free Download

Get Business VoIP Phones, VoIP Phone Systems and other VoIP Equipment for your VoIP solution. VoIP Supply is North America’s leading supplier of VoIP equipment and hardware. Over 85,00 served since 2002.

VentureVoIP is a research and development company in the field of Message Broadcasting, Predictive Dialing, PABX, Call Centre Systems and Telephone Exchanges.

3CX VOIP PBX - provides an easy to use, plug and play SIP - IP PABX for Windows. With a software based IP PBX you will save on PBX maintenance and halve your phone bill. Download the FREE edition today and break free from your proprietary phone syste...

the best softphone for service providers

Office SIP Server is free VoIP and Instant Messaging Software

Software Advice: ERP Software & Business Systems Experts

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Business VoIP from Vonage Business Solutions (formerly Vocalocity) is the most reliable no-contract cloud VoIP phone service for small businesses in the U.S. and Canada.

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

VOIP information, troubleshooting and tutorials to correct faxing, voip quality issues (echo), and one-way audio problems. How to best configure your VoIP connection.