I have created a little branch for Didier Stevens programs. He makes some really useful little gadgets like XORSearch. XORSearch parses a file for plain strings, but also trivially scrambled strings such as ROT13 et al. It's neat.
Anyway, you can get the code like this:
bzr branch lp:ds-tools I have added a makefile that builds all the tools I could get to work on Linux and copies them into the base directory. From there ./
--help should be enough to get you going. Have fun.