Install BASH and coreutils. Anything that is script-based (Python can be compiled as .pyc so beware) should work provided you install the necessary dependencies. BASH, Python, Perl, Ruby should all run fairly well.

Most of the pentesting utilities are written in C and thus you will need the compiled versions. There are script-based interfaces available but most are, well pointless.

As far as python goes, I really like woof.py: http://www.home.unix-ag.org/simon/woof.html

Interesting one-liners here: http://www.commandlinefu.com/commands/browse