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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CryptoMite 

CryptoMite enables you to encrypt, decrypt, and wipe files and folders of any type. It supports various encryption engines, along with zip compression. Functions to build self-extracting encrypted zip files and eMail capabilities are also included.
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Super File Encryption 

Super File Encryption is a powerful and easy-to-use program for encrypting and protecting your data--perfect for offices that need to keep important documents secure. Super File Encryption adds a context menu entry to all files and folders.
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SecExFile Home 

SecExFile brings one-click file protection to the desktop. It integrates with Windows Explorer to make securing your personal or corporate data easy. SecEx File can be configured to email the armoured file once encryption is completed.
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Without A Trace Surf Guard 

Without A Trace Surf Guard is a powerful 3 in 1 privacy tool that combines a history eraser with a powerful pop up stopper and robust encryption tools that will lock down any file or folder.
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Chilkat AES & RSA Encryption Component 

Chilkat Crypt is an advanced ActiveX encryption component that offers both RSA public-key encryption with digital signatures as well as symmetric encryption algorithms including AES (Rijndael), Blowfish, and Twofish.
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