The GtkRadiant sources as originally released under the GPL license.

CONTRIBUTORS

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+GtkRadiant CONTRIBUTORS and CREDITS
+last update: 09/12/2004
+=======================
+
+Loki
+----
+Leonardo Zide leo@lokigames.com
+Mike Phillips (Loki QA)
+Bernd Kreimeier (overall coordination)
+
+QER.com
+-------
+TTimo timo@idsoftware.com
+^Fishman (Pablo Zurita) fish@gamedesign.net
+RR2DO2 rr2do2@q3f.com
+SmallPileofGibs spog@planetquake.com
+
+Curry plugin
+------------
+Mike "mickey" Jackman
+Tim "Maj" Rennie
+
+PrtView plugin, various bug fixes and q3map guru
+------------------------------------------------
+Geoffrey DeWan
+
+Gensurf plugin
+--------------
+David Hyde
+
+PicoModel
+---------
+seaw0lf with assist by ydnar
+
+Q3Map2
+------
+Randy 'ydnar' Reddig
+
+Updated shader files, textures, entities.def, keyboard shortcut list
+overall testing and feedback
+----------------------------
+Jean-Francois "Eutectic" Groleau
+
+Improvements and bug fixing
+---------------------------
+Jan Paul "MrElusive" van Waveren
+Robert Duffy
+Forest "LordHavoc" Wroncy-Hale
+Nurail
+AcidDeath
+Chronos
+Michael Schlueter
+Jamie Wilkinson
+Robert "Tr3B" Beckebans
+
+Web
+---
+Dave "Bargle" Koenig
+Jason "Wolfen" Spencer
+Shawn "EvilTypeGuy" Walker
+
+Thanks to John Hutton, AstroCreep and W2k for web help
+
+FAQ
+---
+Equim and Wex
+
+
+Testing/Feedback
+---
+Black_Dog, d0nkey, Fjoggis, Jago, jetscreamer, gibbie, Godmil, Gom Jabbar,
+Mindlink, mslaf, necros, Promit, Ravo, RPG, scampie, sock, sponge, thiste,
+voodoochopsticks, Zwiffle
+
+
+Misc
+----
+Thanks to everyone on the beta mailing list and
+irc.telefragged.com #qeradiant for testing and feedback.
+Updated icons by AstroCreep!
+Bitch-slapping by RaYGunn!
+Last minute bugs by SPoG! (SPoG--)