For the SkyDrive Explorer, a kind of Dropbox clone, a new definition of cross-platform has been developed:
32/64 bit OS support
SkyDrive Explorer works both in 32- and 64-bit Microsoft® Windows OS. Minimal required OS is Windows XP, and SkyDrive Explorer will successfully work in Windows Vista, Windows Server 2003 and 2008, and Windows 7.
But anyway, tools like Skydrive are killer applications. File servers are nothing new in the business environment but setting these external virtual hard discs up has never been so simple.