Build your own classical encryption devices (Savory's site)

Frode's Crypto Page

Fred Chesson's (aka TRIODE's) SECRET WIRES...Telegraphs and Ciphers of the Civil War

Code Breaking and Secret Weapons in World War II

U.S. Naval Cryptologic Veterans Association

Navy Strip Cipher System

Electronic Cipher Machine (EMC) Mark II

SSEM simulator (the Manchester Baby)

Interactive Enigma, ...

The Chinese "Gold Bar" ciphers

Kassovic's Crypto Site (Enigma, ...)

Everything Enigma

Bletchley Park Info

Tunny: the Lorenz SZ42 cipher attachment

Leary's proof that Bacon wrote Shakespeare

Beale cipher info and freeware