Update – April 29, 2016:
A new build of Office 2013 Click-To-Run – 15.0.4815.1002 – is available now. This build fixes an intermittent crash that may occur in Outlook or Skype for Business (see KB 3158521). To get this build, you can either wait until you are prompted to update, or go to File > Account and select Update Options > Update Now.
The April 2016 Public Update releases for Office are now available. This month, there are 23 security updates (2 bulletins) and 47 non-security updates.
All of the security and non-security updates for April are listed in KB article KB3150264.
A new version of Office 2013 Click-To-Run is available: 15.0.4815.1001
A new version of Office 2010 Click-To-Run is available: 14.0.7168.5000
For information on Office 365 Click-To-Run updates, see Office 365 client update branch releases.