CryptoLab is a freeware cryptography application for Microsoft Windows, and incorporates text-based encryption / decryption through the use of plug-in cipher modules. Advanced features include SMTP email support, a Key Manager and pseudo-random key generation.

Features list:

Plug-in cipher modules.
Advanced pseudo-random key generation.
Easy-to-use tabbed interface for text files.
Key Manager storage utility.
Full password protection (incorporating SHA-1 hashing algorithm).
Integrated SMTP email support.
PDF, HTML and Word Document export options.
Statistics calculator.

Included encryption modules:

Affine Shift
ARCFOUR
Blowfish Cipher
Caesar Cipher
Data Encryption Standard
Modular Shift Algorithm (by EJC Cryptography)
Rijndael (American Encryption Standard)
Substitution Cipher
Vigenere Cipher

With CryptoLab, you can encrypt your text documents with military standard security - algorithms such as Rijndael are used to encrypt classified documents within the US Government. By using CryptoLab, you too can experience this level of security from your own computer. Best of all, it's FREE!

Downloading and running this program in certain countries is illegal as a result of certain cryptographic laws. EJC Cryptography cannot provide legal advice; we therefore encourage you to seek appropriate legal counsel regarding any questions you might have about this program. US Law states that (at the time of writing) cryptographic software may not knowingly be exported to Afghanistan, Cuba, Iran, Iraq, Libya, North Korea, Sudan, Serbia and Syria.