SkyDrive Pro Client Application
When using SharePoint 2013 you are able to Sync your document libraries to your local system when using SkyDrive Pro. SkyDrive Pro was only available on:
SkyDrive Pro is now also available as standalone client application and can be downloaded here:
http://www.microsoft.com/en-US/download/details.aspx?id=39050
“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. The SkyDrive Pro client can be installed side-by-side with previous versions of Office (Office 2010, Office 2007, etc)”