Original Authors and Contributors: Joe Armstrong Robert Virding Mike Williams Claes Wikstr�m Tony Rogvall Magnus Fr�berg Martin Bj�rklund Bj�rn Gustavsson Patrik Nyblom Arndt Jonasson Kenneth Lundin Peter H�gfeldt Torbj�rn T�rnkvist Sebastian Strollo Carl Wilhelm Welin Lennart �hman Hans Bolinder Raimo Niskanen Rickard Green Gunilla Arendt Dan Gudmundsson Peter Andersson Ingela Anderton Jakob Cederlund and probably others... Open source contributors: Richard Carlsson and Sven-Olof Nystr�m: gb_trees and gb_sets Richard Carlsson (several modules)