Bill Haneman <bill.haneman@sun.com>
  High Contrast engine

Suzanna Smith <suzanna.smith@sun.com>
  High Contrast icons

Calum Benson <calum.benson@sun.com>
  High Contrast icons

Seth Nickell <snickell@stanford.edu>

Dave Camp <campd@ximian.com>
  Mist GTK & Marco

Tuomas Kuosmanen <tigert@gimp.org> 
  Default Marco, icons, gtk

Jakub 'jimmac' Steiner <jimmac at ximian dot com> 
  Default icons, Smokey-Blue|Red icons

Susan Kare
  Mist (aka 'Flat-Blue') icons, Sandy icons

Arlo Rose
  Crux icons, GTK, & Marco

Jakub Stainer <jimmac@novell.com>
Luca Ferretti <elle.uca@libero.it>
  HighContrast-SVG icons

Wolfgang Ulbrich <chat-to-me@raveit.de>
  GreenLaguna based on GnomishBeige theme
  Menta based on Zukwito theme
  BlackMate based on GnomishDark theme
  TraditionalGreen based on Clearlooks-Phenix theme

Pedram Pourang <tsujan2000@gmail.com>
  (http://tsujan.deviantart.com/art/GnomishBeige-300113500)
  (http://tsujan.deviantart.com/art/GnomishDark-300548460)

Mattias aka lassekongo83 
  (http://lassekongo83.deviantart.com/art/Zukitwo-203936861)

Jean-Philippe Fleury <contact@jpfleury.net>
  TraditionalOk gtk3 (from Clearlooks-Phenix theme)

Michael Lavers aka kolanos kolanos
  ContrastHighInverse GTK3 part
  (https://github.com/kolanos/gnome-high-contrast-inverse-theme)

Ambiance 69
  Shiny GTK3 part part
  (http://gnome-look.org/content/show.php?content=164764)