Free Skype for Business Basic Client Download

Update 20/12/2015: This post originally talked about the Office 2013 / Lync 2013 / 15.x Basic client that could be patched to Skype for Business 2015. Since then Office 2016 / Skype for Business 2016 have been released, and there is an associated Skype for Business 2016 Basic client, it's...