T r u e C r y p t

Free open-source disk encryption software for Windows 7/Vista/XP, Mac OS X, and Linux

It's use for Creates a virtual encrypted disk within a file and mounts it as a real disk.

This is good as compare to any folder locker. No one can open ur file without our password. 

Latest Stable Version - 6.3a
Windows 7/Vista/XP/2000