Mathomatic icons for your desktop go here.

 icon.rc - Windows resource compiler file used to link icon with .exe file
 mathomatic.desktop - Unix and Linux desktop entry
 mathomatic.icns - Mathomatic icons for Mac OS X
 mathomatic.ico - 32x32 and 64x64 pixels icons for Microsoft Windows
 mathomatic.png - generic 64x64 Mathomatic icon
 mathomatic.svg - The new resizeable Mathomatic logo and icon
 mathomatic.xpm - X-Windows pixmap 32x32 Mathomatic icon
 mathomatic32x32.png - generic 32x32 Mathomatic icon

These icons/logos are free to use for anything Mathomatic related.