SnugServer 

SnugServer is an Email Server, Web Server, FTP Server, NewsServer and ListServer. It's your all-in-one solution to managing your Internet Presence. Comes with Anti-Spam, Anti-Virus & SSL/TLS/S/MIME Encryption. Allows Digital Certificate creation.
email server mail server ftp server listserver web server webserver newsserver ssl tls spam encryption anti-virus

SignetSure 

SignetSure is Win32 security tool for protecting files from hacker alteration. Create digital signatures for your files from Win32 app. Then authenticate your files with single API call. Uses RSA public key cryptography. C/C++ or Visual Basic.
signetsure signature digital signature pki rsa public key security cryptography encryption

PlexCrypt Compression-Encryption 

PlexCrypt allows set of files or folders to compress and encrypts and decrypts set of files or set of folders based on PKI and Passwords using AES, Blowfish, CAST, DES, ElGamal, IDEA, IES, RC4, RC6, RSA, Serpent, etc.
compression encryption decryption public key infrastructure synchronous self decryption aes blowfish cast des elgamal idea ies