Here's xcalc back in Puppy with a skin slightly adapted from what someone did in the ArchLinux forums.
Shades of grey get boring, right?
![Smile :)](./images/smilies/icon_smile.gif)
It's sort of an XResource file that xcalc calls. If you don't like it, copy the original skin from ~/my-applications/backup back to /etc/X11/app-defaults/XCalc. Anyway, you'll see.
Enjoy.
musher0