HsCipherSDK is an Encryption Library providing an API to a suite of symmetric cryptographic algorithms and digital signing functions. The library includes block and stream cipher modules: AES, 3DES, ARC4, CAST-128, Blowfish,Twofish, MD5, SHA-1,SHA256

The CryptoText encryption library contains COM and .NET components for cross-platform Microsoft Windows text and file encryption on Pocket PC and Desktop, including components for dotNet, .NET CF, COM / ActiveX, PocketPC.

CryptoPressStream is the most powerful streaming compression and encryption library for Delphi / C++ Builder. It provides an easy way to compress and encrypt files, streams, strings, buffers and blob fields.

The Xceed Encryption library allows you to easily add strong encryption and decryption capability to your Windows applications. Supports the latest industry-standard strong encryption algorithms and offers both symmetrical and public-key cryptography

The Chilkat Java encryption library provides an advanced API for symmetric encryption, public-key encryption, digital signatures, hashing, and encoding/decoding.

Security toolkit with strong encryption and authentication. Supports many algorithms for symmetric/asymmetric encryption, authentication, and hashing. Free for non-commercial/shareware projects. Written in C. ActiveX and C++ wrappers are available.

Open SSL 0.9.7c lets applications use Secure Sockets Layer (v2/v3), Transport Layer Security (v1), and a general-purpose cryptography library, for data integrity, authenticity, and privacy security features. Perl or Cygwin needed for Win32 compile.

The Encryption Toolkit includes all the tools you need to add file encryption and data encryption to your applications. The toolkit includes COM encryption objects with a standard interface for both the Pocket PC and Windows® desktop platforms.