P2P Messenger .NET 

P2P Messenger is secure Instant Messaging client, working by Peer-to-Peer technology. It is fully decentralized and does not require any servers. Supports public-key cryptography
chat p2p messenger instant crypto secure icq

SDProtector Pro 

SDProtector is a powerful tool offering both software developers and distributors a protection of software products against unauthorized copying, use and distribution.With SDProtector,it's easy to turn your application in "try-before-you-buy" version
software protection protect software software license management compress compression anti-debugging anti-dumping anti-disassemble protect protector protection anti-softice anti-bpx anti-tracer

HashTab 

A windows shell extension which installs a new tab with file hash information. Includes MD5, SHA1 and CRC032. Also allows for easy hash comparison. Great for verifying downloads without requiring any external tools.
shell hash crypto windows file md5 sha1 crc crc-32 extension

Cryptgine Archiver 

Cryptgine Archiver creates compressed and encrypted archives that can be securely distributed over the internet. Built with the Cryptgine Application Programming Interface you may use 256 bit AES encryption or use your own by creating a plug-in.
encryption archive zip security

DLOCK2 

DLOCK2 is a simple command line file encryption/decryption utility program that uses the free Diamond 2 Encryption Algorithm. Full source code included. Version 2.01 is the same as the original DLOCK2, except recompiled for the Win32 command line.
security utility encryption file management crypto dlock diamond dlock2 diamond2

CryptoForge 

This suite of tools enables you to safely encrypt, decrypt, and shred any type of file, entire folders and drives with ease. An included text editor allows you to create and encrypt secure documents that can be sent by any e-mail or messenger program
encryption software encrypt security encrypted privacy password secure folders messages email algorithm rijndael