Debhelper is written by and copyright 1997-2002 Joey Hess <joeyh@debian.org>.

Increasinly miniscule parts of the code (and certainly my inspiration from the
whole thing) came from debmake, by Christoph Lameter <clameter@debian.org>.

Some of the dh_md5sums command is from a program by Charles 
Briscoe-Smith <cpb4@ukc.ac.uk>.

dh_perl is by Brendan O'Dea <bod@debian.org>
dh_python is by Josselin Mouette <josselin.mouette@ens-lyon.org>

The copyright of this package is GPL, version 2 or later. Files in the
examples/ directory are in the public domain. On Debian systems the
complete text of the GPL is in /usr/share/common-licenses/GPL