WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
Popular easy-to-use and secure password manager
Open source disk encryption with strong security for the Paranoid
Aviator hack: seed-inspection of aviator crash predictor & aviator app
Professional password generator and manager with full Unicode support
Add digital signatures to PDF documents - GUI and CLI, cross-platform
Implementation of the EDIINT AS2 protocol (RFC 4130)
For full, incremental, compressed and encrypted backups or archives
A 448-bit Edwards curve
Digital Signature & eSigning software. Bulk PDF signing. Sign all Page
UFONet - Denial of Service Toolkit
PGP graphical user interface
Single Linux or Windows binary for secure text encryption
cross-platform, encryption application
MToken - Tokens processing system (Security)