WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
For full, incremental, compressed and encrypted backups or archives
C++ cryptographic library (modern hash functions, ciphers, KDFs)
The safest way to store private data in untrusted (cloud) environments
Robust and flexible VPN network tunnelling
antigift is simple cross-platform, files & folders encryption tool
Multi hash crack suite
Send Mime and Smime Emails to Any Type of Mail Server
GILIB Large Integer Arithmetic Library
Comfortable hash-tool for texts and files
Secure mail + Tor gateway
A tool to encrypt files in Russian.
Portable, secure and open source AES256 password manager
Secure Striker Manager
Protect and Obfuscate Encode PHP File From reading ( Opensource )
sha3sum - A demonstration of the Keccak permutation.
A tiny, fast encryption tool in C
A family of FLEA-inspired CSPRNGs and Stream Ciphers