OpenSSL 

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.
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SafeCryptor 

SafeCryptor is the encryption system where your own computer is your unique key. SafeCryptor lets you securely and quickly send all of your sensitive and personal information via e-mail or chat session to your partners, customers, friends or family.
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SecureFile 

SecureFile is an encryption and compression program that allows you to encrypt and decrypt files password and digital certificate. It creates a self-decryption archive which can be decrypted at the other end without any dependencies.
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Proxy Workbench 

Proxy Workbench is a unique proxy server ideal for developers, trainers and security experts that displays its data in real-time.
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