I use bestcrypt with 448 bit blowfish encryption. It's a pretty good package, and in several years of use I've had no problems.

Note that if the encryption used is any good, no matter which program you use, if you lose the password/passphrase you're completely screwed. That's the whole point of encryption, after all If you can get the data back without the key, it's not secure in the first place, and therefore a waste of time.

pca