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MCC, Multiple Channel Cryptography, is an open source code library for adding strong encryption to projects with a minimum of effort, and without the very steep learning curves often associated with cryptography.
Developer: MCC Development Team
License: GNU General Public License (GPL)
Operating System: ALL
"ZIP 2 Secure EXE" is a utility program that creates self-extracting EXE files for Windows 95/98/Me/NT/2000/XP.
Developer: Chilkat Software, Inc.
License: Freeware
Operating System: Windows
This online tool lets you encrypt or decrypt text and files using a variety of ciphers like DES, Blowfish, Rijndael and many others using different block modes.
Developer: bierkandt.org
License: Freeware
Operating System: All
R-Crypto is a disk encryption software to protect confidential information and personal data on a desktop, notebook, or a removable data storage device against unauthorized access.
Developer: R-tools technology Inc.
License: Freeware
Operating System: Windows 2000/XP/2003/Vista/7

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