Ethical Hacker Community Forums

Hi,
I've stumbled a long time ago into a software used for cryptography that does many thing among pattern identification.
I don't remember the name of the software so you if know where I can find it, please !!!  :D
On the other hand if you know any good sources on pattern identification like a website or any other piece of software ( Linux-based or Win-based ), that might help too !!
thx for your help.

-chevalier3as