AceEncrypt - Add data and file Encryption and Decryption to your application
Cryptocx is a fully PGP compatible encryption component.
DGEncrypt - is an implementation of the Rijndael block cipher
EZCrypto.NET - Quick and easy encryption of files, strings or streams.
FileCrypto - Encrypt/Decrypt files with your .NET application.
IP*Works! S/MIME - encrypt files, emails, and newsgroup postings as well as sign and verify message signatures.
InaCryptCompress.Net - A component that integrates crypt and compress functionality into one.
JDockFloatPro - Make any AWT and Swing component dockable and floatable
Protection PLUS copy protection package - On Sale