Powerful webdav client and sync tools with client-side AES encryption
UFONet - Denial of Service Toolkit
57 Hash Functions In One Program, plus each with HMAC or KMAC
C++ cryptographic library (modern hash functions, ciphers, KDFs)
OpenSC - tools and libraries for smart cards
Open Source PKI solutions
GMR digital signature system
Support Tools for OpenSSH with multiple agents
A Java application for transferring computer files in 5 letter groups
AES-128, Linux, OpenBSD, Assembly-Language