Found this lot in my bookmarks, can't guarantee they all still work though...
http://archicado.free.fr/
http://www.archiradar.com/eng/gdl.htm
http://www.gdl-centrum.com/FRAMESET.php
http://archicado.free.fr/download/toudeco.html
http://www.encina.co.uk/object_serv.html
http://www.studio-arkada.com.pl/gdl_objects_us.htm
http://www.alfaville.com/archscene/druha.php?category=2
http://www.winhard.de/objekte/gdl_samples1.html
http://www.b-prisma.de/english/links.html
http://www.cad-objekte.de/
http://www.opengdl.org/
http://www2.asro.kuleuven.ac.be/asro/English/HOME/SBs/tutorial/tips/ac2c4d.htm
http://www.e-interiors.net/index.php?
page=index&left=frameleft&up=frameup&down=home¯ocat=home&language=en&ris=2
http://www.parametricprojections.com.au/
AC versions 3.41 to 25 (UKI Full 5005).
Using AC25 5005 UKI FULL
Mac OSX 10.15.7 (19G2021) Mac Pro-2013 32gbRam AMD FirePro D500 3072 MB graphics