several tools which might turn out helpful, sometimes
cALCulator — A tool to calculate blood alcohol levels
Humidex calculator — A tool to calculate the humidex
Timer — A web-based stop watch
MIME decoder — Decode base64- or q-p-encoded MIME documents
MySQL Preference Pane for Mac OS X
Mandelbrot — a program to compute the Mandelbrot set on Mac OS X
Using ClamAV with Apple Mail — tools and instructions
CR/LF conversion — some Unix shell scripts for the conversion between DOS, Unix and Mac line endings