The project is currently maintained by:

Rafal Mantiuk <mantiuk@gmail.com>

Multiple people contributed to the project, including (in arbitrary order):

Grzegorz Krawczyk <krawczyk@mpi-sb.mpg.de>
Miloslaw Smyk <thorgal@wfmh.org.pl>
Ivo Ihrke <ihrke@mmci.uni-saarland.de>
Alexander Efremov <aefremov@mpi-sb.mpg.de>
Dorota Zdrojewska <dzdrojewska@wi.ps.pl>
Jan Otop <jotop@mpi-sb.mpg.de>
Christian Bloch <Blochi@edenfx.com> (Improved templates for HDR-HTML in src/hdthtml/hdrhtml_hdrlabs_templ)
Radoslaw Mantiuk  <rmantiuk@wi.ps.pl> 
Oliver Barth
Delvin Varghese
Hugo Brito Lima
George Ash