Using capturexfont to generate new fonts

I would like to use fonts that are completely free to use for personal and commercial use.

I have been trying to use capturexfont to generate new font data to replace the files glut_8x13.c and family.
I have not managed to create any font data The font data has come out with 0 bytes of data for each character.

Does anyone know of any other available font files?

Or can you suggest good fonts that will successfully be parsed by capturexfont?

I am using the latest GLUT 3.7 tarball on Ubuntu 9.04.