Things you might be looking for:

Software:

enigma-suite
libmpdec
cdecimal

Papers:

papers

A formal proof for the stability of mergesort:

mergesort-stable

M4 Message Breaking Project:

M4 Project
M4 Project Client Install
M4 Project Results
M4 Project Statistics
M4 Project Mailing Lists
M4 Project Blog

Howtos, install instructions:

daemontools install instructions
ucspi-tcp install instructions
getting started with tcpserver
setup of a daytime server
common tcpserver setups




Recommended sites about classical ciphers:

Frode Weierud's CryptoCellar: CryptoCellar



Google
WWW bytereef.org

Contact:

Stefan Krah <website @ bytereef.org>