While DGD is in the LPC server family, along with MudOS, LDMud and CDlib, it is closest in capabilities and design to the ColdC server.
DGD runs on Windows 95/98/NT/2000, MacOS, and many versions of Unix.
DGD version 1.4 was released as Open Source on 3 February, 2010.
https://www.dworkin.nl/mailman/listinfo/dgd
http://dgd.is-here.com/twiki/bin/view/DGD/WebHome
http://dgd.is-here.com/dgd/faq/
http://phantasmal.sourceforge.net/DGD/
http://dgd-osr.sourceforge.net/