QuickCrypt Library 

Fast, highly optimized implementation of symmetric (private-key) encryption algorithms: DES, Triple DES (3DES), DESX, BLOWFISH, RIJNDAEL (AES-Advanced Encryption Standard),GOST. Allows to encrypt/decrypt files, memory blocks, strings, streaming data.
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EXEsafe 

EXEsafe allows you to encrypt and put a lock on a program file, such as a game, or your office software, using a password, the time, or even your username. When run, the lock will process all information, and bar access to the program appropriately.
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SecureFile 

SecureFile is an encryption and compression program that allows you to encrypt and decrypt files password and digital certificate. It creates a self-decryption archive which can be decrypted at the other end without any dependencies.
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DigiSecret 

An application for strong file encryption, compression, and file sharing (peer to peer). It utilizes time-proven encryption algorithms for creating encrypted archives and self-extracting EXE files, as well as for sharing files over the Internet.
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Crypton 

Crypton is a multi-utility security suite, which provides strong security for you files
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Chameleon 

Chameleon allows you to hide files, directory files by compressing , encrypting , scrambling them and then attaching them to the host files of your choice. This Chameleon file then looks and behaves like a normal file.
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