The long awaited standalone SkyDrive Pro sync client has just been released!
The standalone SkyDrive Pro sync client allows users of SharePoint 2013 and SharePoint Online in Office 365 to sync their personal SkyDrive Pro and any SharePoint 2013 or Office 365 team site document libraries to their local machine for access to important content on and offline.
Until the release of the standalone version you would need an installed Office 365 Pro Plus, Office 365 Small Business Premium, or Office Professional Plus 2013 client on your PC in order to be able to sync SharePoint files to your desktop.
The SkyDrive Pro client can be installed side-by-side with previous versions of Office (Office 2010, Office 2007, etc)
Read more on the SharePoint Team blog here. You can download the standalone SkyDrive Pro sync client here