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). The interface is easy to use and similar to that of popular Smartphones. 3CXPhone is compact and easy to install across a network. Features include Call Transfer, Call Recodrding, Hold, Headset support, Call History. Full version, not a lite version! Free download from http://www.3cx.com