QuickCrypt Library
A fast, highly optimized implementation of symmetric (private-key) encryption/decryption algorithms: DES, Triple DES (3DES), DESX, BLOWFISH, RIJNDAEL (AES - Advanced Encryption Standard), GOST (USSR/Russian Encryption Standard). It supports 5 modes of operation: ECB (Electronic Codebook), CBC... It has no external dependencies such as MFC DLLs, COM/DCOM or other component. ... The help file has C, C++ and Visual Basic (VB) examples showing how to add encrypting/decrypting functionality to Windows applications quickly and easily.
http://www.slavasoft.com/zip/quickcrypt.zip - 400Kb - Download - Screenshot

Advanced Encryption Package 2006 Professional
Typically you encrypt files because you don't want others to see them, but sometimes you want to send someone an encrypted file. Most if not all encryption programs allow you to do so--they vary, however, in terms of how difficult the process is. AEP2006 PRO most noteworthy feature may be its... ) undustrial encryption algorithms: DESX, BLOWFISH, RIJNDAEL(AES), CAST, 3-DES, RC2, DIAMOND2, TEA, SAFER, 3-WAY, GOST, SHARK, SQUARE, SKIPJACK, TWOFISH, MARS, SERPENT. ... Either key may be used to encrypt a message, but only the other corresponding key is used to decrypt the message.
http://www.secureaction.com/encryp...pro/download/aep2006pro_setup.exe - 2Mb - Download - Screenshot