Logo, icons:
  Karola Kreńskiego
  Thomas Dybdahl Ahle
  Max Froumentin

Piece sets:
  Alastair Scott http://www.enpassant.dk/chess/fonteng.htm
  Armando H. Marroquin http://www.enpassant.dk/chess/fonteng.htm
  Colin Burnett http://en.wikipedia.org/wiki/User:Cburnett/GFDL_images/Chess
  Eran Karu / Ben Van Vlierden http://www.benvanvlierden.nl/
  Eric Bentzen http://www.enpassant.dk/chess/fonteng.htm
  James Kilfiger http://sites.google.com/site/jameskilfiger/
  Klaus Wolf http://www.enpassant.dk/chess/fonteng.htm
  Maurizio Monge http://poisson.phc.unipi.it/~monge/
  Matthieu Leschemelle http://www.enpassant.dk/chess/fonteng.htm
  Peter Wong http://www.virtualpieces.net/
  Peter Thomson http://www.dachaidh.co.uk

Sounds:
  Bidgee http://commons.wikimedia.org/wiki/File:Activated_fire_alarm_%28sound%29.ogg