cocoagcalc offers a very simple Cocoa front-end for gcalc. gcalc is a command-line tool that uses Google's built-in calculator. See http://unixjunkie.blogspot.com/2006/10/google-calculator-from-command-line.html for more information.

This app assumes gcalc has been copied to /usr/bin for now.

Acknowledgments: Greg Miller for gcalc and Andreas Mayer for AMShellWrapper.