WinRAR 

Powerful archiver and archive manager. RAR files can usually compress content 8 to 30 percent better than ZIP files. Main features are strong compression, processing of non-RAR archives, long filename support, self-extracting archives and more.
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BladeBox Iron Edition 

BladeBox creates virtual encrypted volumes, which are AES-encrypted files which can be mounted as if they were disk drives (with a DOS drive letter too).
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dsCrypt 

dsCrypt is AES/Rijndael file encryption software with simple, multi-file, drag-and-drop operations. It features optimal implementation, performance, safety measures and offers unique options for enhanced security.
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DeepCoder 

DeepCoder is a program to encrypt, decrypt and/or digitally sign e-mails and files using secret keys (passwords) or public keys. It can be used with any e-mail program or wordprocessor program. No plug-ins are required. Very easy to use!
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1 Click Encrypt File Folder Encryption 

1 Click Encrypt is the encryption utility that brings military strength encryption power at your fingertips, assuring that your files are secured and protected from intruders and spies. It can encrypt or securely hide any type of file.
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PC Safe 

This is very useful tool if you have more than one account for forums, web mail or similar web sites or applications. PC Safe features "Quick Login" feature which fills login forms in ANY web browser, password generator, password tester and more.
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