WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
For full, incremental, compressed and encrypted backups or archives
Robust and flexible VPN network tunnelling
Powerful webdav client and sync tools with client-side AES encryption
antigift is simple cross-platform, files & folders encryption tool
C++ cryptographic library (modern hash functions, ciphers, KDFs)
Send Mime and Smime Emails to Any Type of Mail Server
Protect and Obfuscate Encode PHP File From reading ( Opensource )
A program to generate random reciprocal bigram tables
A Java application for transferring computer files in 5 letter groups
Code to brute force the 32-bit key used to RC4 encrypt .pwl files.
EFT simulator