usb drive software

So I've heard of software you can run from your USB drive, but I didn't know there were several competing ways of getting this done.
U3: runs on most win32 machines, even if you don't have admin privleges, app must be specifically designed to use U3 APIs
MojoPac: must instal drivers first, but fast enough to run big time apps, and will run any app you need
Moka5: uses VMWare to run apps in a virtualized machine

Bring the power of portable software to your USB flash drive - make it a U3 smart drive!