Lepton's Crack is a generic password auditing tool (hash cracker), extensible via a simple plug-in system.

MCSoft offers highly secure Cryptography and Wipe Software. Applications, Developmenttools, algorithms for file encryption and digital signatures. Authentication, Hash, Wipe, AES and Security Algorithm.

Pentest Security with an Oracle twist - consulting,penetration testing, security audit, tips, tools and securing Oracle

PwdDoubleCheck is an easy to use application to check the strength of your passwords on Windows based systems.

Definitions of algorithms, data structures, and classical Computer Science problems. Some entries have links to implementations and more information.

Open-source GPL rootkit scanner for Unix-like systems. Scans for rootkits, trojans, backdoors and local exploits. Tests include scanning of plaintext and binary files for MD5 hash comparisons, default rootkit files, binary permissions, suspect LKM/KLD module strings, and hidden files.

Remote management of computers without remote client software

010 Editor: Professional hex editor with Binary Templates. A fast, flexible, easy-to-use hex editor.

Free threaded COM object designed for authentication and encryption(rc4).

ZeitControl's BasicCard is an inexpensive Basic programmable smart card