Microsoft just released Lync client for Windows 8 to further usher-in the BYOD timeframe. So you are no more bound to that old archaic office client. So, if we have Skype on Windows 8 for consumer communications, we now have Lync for Business Communications. Here is Microsoft’s description of the App from the Store:

IMPORTANT:  Microsoft Lync won’t work without Lync Server or an Office 365/Lync Online account.  Also, some functionality might require an update to Lync Server or might not be available to all users.  If you’re not sure about your account status, please contact your IT department.
This is Lync reimagined for the new Windows Experience and optimized for touch: providing fast, natural, hands-on control of your communications.
Lync meets all your communication and collaboration needs: integrating voice & video calls, Lync Meetings, presence and IM in a fast, fluid, easy-to-use app.

Communicate from anywhere with an Internet connection.
Easily switch between IM, voice, or video or use all at once.
Stay connected to your colleagues with real-time status updates, rich presence information and fast and fluid contact list search and management.
Join Lync Meetings with a single touch and easily switch between IM, group video, and content views.
Stay connected while reducing resource consumption — Lync provides background and connected standby connectivity so you never miss an important conversation.
Use Windows search to find and communicate with your colleagues.
Snap view — Need to reference another app or website while using Lync? Lync can snap to the side of your screen so you can multi-task and use both apps at the same time.


Now if only my Office will deploy the latest Lync Server and stop living in the past. If you are one of the lucky ones with the latest Lync Sever that support this app, go ahead and download via the Source link.

Source: Windows Store