The author of Crack, a Unix password cracker. A collection of software, libraries, and documentation for Unix security.

Archive of exploits for many systems. Pages have not been updated since 1998 and are preserved only for posterity.

A portable password cracker with built-in efficient implementations of multiple password hashing algorithms found on various Unix flavors.

Tool that lets a system administrator run complex or simple scanner scripts on any number of machines in a heterogeneous environment. Unmaintained since 1995.

Lists vulnerabilities, white papers and utilities.