I guess the name of this application says it all. You can use Crypt4Free to encrypt and decrypt your sensitive files. This way you can be sure that no one would be able to access them unless they know your password. You can use either the Blowfish or the DESX algorithm to encrypt files.

Crypt4Free supports adding a riddle to each encrypted file. This riddle is supposed to help you remember the password which you used when encrypting. I suggest you be careful when choosing what you want to do with the source files. If you choose to erase the original files and you don't remember your password, you won't be able to decrypt the files.

The application supports automatically attaching the files you select to an email. It opens your default e-mail client allowing you to enter the recipient's address. You also have the option to compress any file on your computer. Only ZIP compression is supported by Crypt4Free.

Pluses: Crypt4Free has some other useful features, including a password generator, a computer history cleaner, and a file wipe utility.