Microsoft Lync 2013 stand-alone client through the Microsoft Open Government Program.

Microsoft Lync 2013 is a unified communications platform on which users can make a phone call, keep track of their contacts' availability, send an IM, and start or join an audio, video, or web conference.

Microsoft Lync 2013 stand-alone client is used to interact with Lync Server. You can connect without this product through a web browser, however with limited functionality. This application allows the user to install the full Lync capabilities on a PC.