Similar to CrypTool

Hashcat

Hushmail

Jami (software)

John the Ripper

KeePassX

KeePassXC

KGPG

Kontact

LibreSSL

Linux Unified Key Setup

Microsoft Outlook

NaCl (software)

Network Security Services

OMEMO

OpenSSH

Openswan

OpenVPN

Ophcrack

Peer-to-peer

Pretty Good Privacy

Proton VPN

ProVerif

PuTTY

Qubes OS

Riseup