CompPad is an OpenOffice extension to provide live mathematical and
engineering calculations within a Writer document, allowing calculations to be
documented using all of the resources of OpenOffice. It will have
functionality similar to Mathcad, but is not intended to be a Mathcad clone.
Rather, I hope it might prove more flexible and extensible, and that it might
encourage other free / open-source alternatives to a proprietary engineering
"Killer App."