Skype for Business Server 2015, Capacity Calculator

Microsoft has released the Microsoft Skype for Business Server 2015, Capacity Calculator - February 2016
Download from here

Microsoft Lync for Mac 2011: February 2016

Microsoft released Microsoft Lync for Mac 2011 v14.3.3
See description in KB3139293 and download from here

Microsoft Lync 2013 / Skype for Business 2015: February, 2016

Microsoft released Lync 2013 / Skype for Business 2015, v15.0.4797.1000
See description in KB3114732 and download from here x86 or x64 (Remember to check the Prerequisites)

Skype for Business 2016: February, 2016

Microsoft released Skype for Business 2016, v16.0.4339.1000

See description in KB3114696 and download from here x86 or x64 (Remember to check the Prerequisites)