John The Ripper

Widely considered to be THE best password cracker around. This one works in Windows (in a DOS box), and features the excellent 'incremental' mode. Goto the text section for a text file on using it.

Hak Tek

A fine collection of toyz.

Demon Dialer

This wardialer is the best fucking thing i have seen in a long time, if you wanna get a simple, and easy to use wardialer get this one, and get scanning those prefixes.

Revelation

Exposes the *'s in password boxes.