CryptoFish Description:

CryptoFish is encryption utility that you can use to encrypt/decrypt files and folders to protect them from unauthorized use. CryptoFish uses a 448 bit Blowfish algorithm.
It is very easy to use. It will add "Encrypt with Cryptofish" command to the context menu that appears when you right-click a file in Windows Explorer. It also has built-in key manager and temporary "key memory".