c2epub
Ebooks. 16:01, 2010.05.30. 
On my github repository you can now find an alpha version of my c-to-epub conversion tool.
c2epub is a tool able to generate ebooks in the EPUB format packaging c source code.
It is different from other epub generating software since default font of generated ebooks is a fixed width one. Blank lines, spaces, tabs are preserved and it provides C syntax highlight.
You can choose to package a group of source files together or process them one by one creating different epubs.
Run it with -h to get the usage help. Default is single output file, no syntax highlight
usage: c2epub [options] [source files...]
source files have to be in the same directory you run c2epub.
-t title package title (output filename base)
-g enable grayscale
-m multiple files output
-h print this help
-v print version information
Get source and binary here.