AspEncrypt  
   An active server component that provides file encryption and digital-signature functionality, S/MIME-based secure mail support and X.509 certificate management capabilities. Requires runtime licensing. By Persits Software, Inc. [Component, Commercial]
   http://www.aspencrypt.com/

Lucigenic Crypt  
   Encryption component that implements the Rijndael AES and Blowfish algorithms. By Lucigenic. [Component, Commercial]
   http://www.lucigenic.com/BlowFish%20Machine.htm

Polar Crypto  
   COM component for data encryption/decryption. Supports AES (Rijndael), Twofish, and SHA-1 algorithms. By Polar.
   http://www.polarsoftware.com/products/crypto/

Xceed Encryption Library  
   Provides data encryption and hashing services with supports for AES, Twofish, RSA, SHA-2, and HAVAL algorithms. By Xceed Software Inc. [Component, Commercial]
   http://www.xceedsoft.com/products/Encrypt/

Chilkat Crypt  
   Supports up to 256-bit AES, 2048-bit RSA public-key cryptography, and digital signature creation and validation. By Chilkat Software, Inc. [Component, Commercial]
   http://www.chilkatsoft.com/ChilkatCrypt.asp

CryptoTools  
   Encryption component. DES, 3DES, MD5, RSA and BASE64. Encrypt Variants and files. By GCE. [Component, Commercial]
   http://www.gcesoft.com/cryptotools/

EasyByte Cryptocx  
   Supports 128 bit Blowfish, 192 bit file encryption and intrinsic 512-8096 bit PGP based encryption. Requires runtime licensing on servers. [Component, Commercial]
   http://www.easybyte.com/products/cryptocx.html

Xitech Cryptor  
   File encryption using a proprietary algorithm. Requires runtime licensing. By Xitech. [Component, Commercial]
   http://www.xitech-europe.co.uk/Cryptor.html

Cipher448  
   Control that supports AES, Blowfish, and Triple DES algorithms. [Control, Commercial]
   http://www.sliderule.com/html/c448_main.shtml

Nickellie Encryption Toolkit  
   Encryption components enabling developers to add file encryption and data encryption to Pocket PC and Windows applications.
   http://nickellie.com/encryption.asp

littleBIGware addCRYPT  
   Provide encryption and one-way hash methods. [Component, Commercial]
   http://www.littlebigware.com/addcrypt.html

ABCCrypto  
   A component for encrypting and decrypting files and data. By WebSupergoo.
   http://www.websupergoo.com/abccrypto-1.htm

Chilkat Easy RSA  
   for certificate-based public-key encryption, decryption, and digital signature creation and validation. [Component, Commercial]
   http://www.chilkatsoft.com/easyRsa.asp

xTyAESCrypter  
   A light-weighted component that implements the NIST standard AES symmetric key encryption.
   http://www.xTyTech.com/xTyAESCrypter/index.htm

Essential Compression & Encryption Control  
   Provide encryption of both text and binary files using DES, RC4 and BlowFish. By Cebrasoft. [Component, Commercial]
   http://www.cebrasoft.co.uk/compression.htm