I'm afraid I can't see anything for ARPing, but it looks like ettercap and ngrep are available through fink.
ettercap (without ssl) - http://fink.sourceforge.net/pdb/package.php/ettercap
ettercap (with ssl) - http://fink.sourceforge.net/pdb/pack...p/ettercap-ssl
ngrep - http://fink.sourceforge.net/pdb/package.php/ngrep
edit: i'm sure you already know this but just in case ... Once fink is installed you merely sudo apt-get install <pkgname>.