Add digital signatures to PDF documents - GUI and CLI, cross-platform
Robust and flexible VPN network tunnelling
UFONet - Denial of Service Toolkit
Powerful webdav client and sync tools with client-side AES encryption
antigift is simple cross-platform, files & folders encryption tool
A modern, AI-Smart, WASTE p2p for ipv4 and invisible address spaces
GMR digital signature system
Open Source PKI solutions
SCSI Tape Encryption Manager
Secure mail + Tor gateway
CrococryptQuerl is a web-based file encryption & transfer tool
Encrypting, anonymous, unlimited size message transfer system
Ciphermail email encryption gateway (S/MIME, OpenPGP, PDF encryption)
mod_gnutls apache module