3CX FREE VOIP Phone for Windows
Free VOIP / SIP phone (softphone).
Use your PC as a phone. Works with any SIP / VOIP provider/ phone service. Use instead of the soft phone provided by your VOIP provider which locks you into their VOIP phone service. Easy to use interface to transfer, forward calls or review history of calls. Call log, caller ID, integrates with MS Outlook. Available in many languages. Free download from http://www.3cx.com.