* bowling.ac, plunger.ac, cake.ac, bomb.ac, anchor.ac
    created by MiniBjorn (c) 2008
    released under Creative Commons Attribution-Share Alike 3.0
    [http://creativecommons.org/licenses/by-sa/3.0/]

* bubblegum.ac, nitrotank-big.ac, nitrotank-small.ac, giftbox.ac
    created by MiniBjorn (c) 2008
    released under Creative Commons Attribution-Share Alike 3.0
    [http://creativecommons.org/licenses/by-sa/3.0/]

* banana.ac
    created by horace aka thomas oppl (toppl@fh-sbg.ac.at) (c) 2008
    released under Creative Commons Attribution-Share Alike 3.0
    [http://creativecommons.org/licenses/by-sa/3.0/]

* chest*
    by MiniBjorn (c) 2010
    released under Creative Commons Attribution-Share Alike 3.0
    [http://creativecommons.org/licenses/by-sa/3.0/]

* village
    released under CC-BY-SA 3.0 [http://creativecommons.org/licenses/by-sa/3.0/]
    oak by Julius Krischan Makowka, released un CC-BY-SA 3.0
    mushrooms by pfunked, with modifications by Marianne Gagnon, released under CC-BY-SA 3.0
    pinos by Moser Juan José, with minor modifications by Marianne Gagnon, released under CC-BY-SA 3.0
    scene and finishing touches by Marianne Gagnon

* shroom_color* textures by Julius Krischan Makowka, released un CC-BY-SA 3.0

* door.png by Marianne Gagnon, released under CC-BY-SA 3.0, based on a public domain image
  from BurningWell.

Others are GPL.