Microsoft Lync
Microsoft Lync Client 64 bit click here.
Microsoft Lync Client 32 bit click here.
 
Microsoft Lync for MAC click here.
 
 
Microsof Office Communicator R2
Microsoft Communicator for Windows R2 click here.
Live Meeting client click here.
Microsoft Live Meeting Outlook Conference add-in click here.
 
Microsoft Messenger for MAC click here.