Free on-the-fly USB disk encryption - Better than TrueCrypt OR FreeOTFE

http://www.rohos.com/products/rohos-mini-drive/comparison-matrix/
http://rohos.com/1/products/rohos-disk-encryption/
http://rohos.com/1/products/rohos-mini-drive/

Rohos Mini Drive

http://en.wikipedia.org/wiki/Truecrypt
http://en.wikipedia.org/wiki/FreeOTFE_Explorer