Software by 3CX Ltd

Free VOIP / SIP phone (softphone) for Windows. Use your PC as a phone. Works with popular VOIP providers and SIP PBX's (including 3CX Phone System). Easy to use & light weight. Full version, not a lite version! Free download from http://www.3cx.com

3CX VOIP Phone System FREE edition is a SIP-based IP PBX developed for Windows. Easy to install and configure, it eliminates phone wiring and allows hot desking. Lowers call costs via VoIP providers & eliminates vendor lockin. Download FREE edition!