Shftool is the reference implementation for the new, 
XML-based Standard Hex Format (SHF). 
Shftool is also a working converter/generator/extractor 
between/to/of SHF-files and other hex formats.

SHF is specified in the following Internet Draft:
http://ietf.org/internet-drafts/draft-strombergson-shf-06.txt

WWW: http://www.df.lth.se/~triad/krad/shftool/