I would like to password protect my data on my USB stick. I could use Bitlocker but then I would need a windows 7 machine with bitlocker to unlock it. I did some searching and found some apps like truecrypt but it looks like you need the APP on the destination PC to unlock it.
I would like to be able to use it on all windows OS's and possibly unix.

Any thoughts or tips appreciated.
P.S this is a standard USB stick, not secure or anything fancy.