The American Cryptogram Association http://cryptogram.org/
Cipher Types http://cryptogram.org/cipher_types.html
Codes, Ciphers, & Codebreaking http://www.vectorsite.net/ttcode.html
Basic Cryptanalysis http://www.umich.edu/~umich/fm-34-40-2/
Military Cryptanalysis http://www.nsa.gov/public_info/declass/military_cryptanalysis.shtml
Code Penguin's Cryptography Archive http://www.codepenguin.com/category/cryptography/
Handbook of Applied Cryptography http://cacr.uwaterloo.ca/hac/index.html
List of Free Online Cryptography Books http://freecomputerbooks.com/specialCryptographyBooks.html
Self-Study Course in Block Cipher Cryptanalysis https://www.schneier.com/paper-self-study.html
The Cryptanalysis Blues http://sota.gen.nz/crypt_blues/
Identifying Unknown Ciphers http://practicalcryptography.com/cryptanalysis/text-characterisation/ide...
CrypTool List of Ciphers http://www.cryptool-online.org/index.php?option=com_content&view=article...
Puzzle Baron Cryptograms http://www.cryptograms.org/
Most Common Letters, Digrams, and Trigrams in the English Language http://academic.regis.edu/jseibert/Crypto/Fa2010/Subs/Frequency.pdf
WordDetector.com http://worddetector.com/
2 Letter Words http://www.yak.net/kablooey/scrabble/2letterwords.html
3 Letter Words http://www.yak.net/kablooey/scrabble/3letterwords.html
Practical Cryptography http://practicalcryptography.com/cryptanalysis/stochastic-searching/cryp...
Hacking Secret Ciphers With Python http://inventwithpython.com/hacking/
An Intro To Crypto Programming Using Python http://jdege.us/crypto-python/index.html
pycipher - Common classical ciphers implemented in Python https://github.com/jameslyons/pycipher
Tools for Cryptography http://www.ecrypt.eu.org/tools/overview
The CrypTool Portal https://www.cryptool.org/en/
EverCrack (GPL) Open Source Cryptanalysis Engine http://evercrack.sourceforge.net/
List of Cryptanalysis Tools http://www.securityfocus.com/tools/category/54
The Vigenere Cipher http://user.it.uu.se/~olgag/Cryptology/vigenere.html
Vigenère Cipher Code http://rosettacode.org/wiki/Vigen%C3%A8re_cipher#Python
PyGenere - Automatic Decoder/Solver http://smurfoncrack.com/pygenere/pygenere.php
Vigenere Online Analysis and Cracking http://f00l.de/hacking/vigenere.php
Vigenère Cipher Codebreaker http://www.mygeocachingprofile.com/codebreaker.vigenerecipher.aspx
Sharky's Vigenere Cipher http://sharkysoft.com/misc/vigenere/
