https://download.delftship.net/DSFree.php

and with a very big detailed PDF! ;)

Else seems this ones are for MAC! ;)

http://www.touchcad.com not sure that is something free here :)
maybe the demo! http://www.touchcad.com/tc3download.html

http://www.jsdn.es/jSDN/en/mainframe.html

maybe this one (not tested) https://moiscript.weebly.com/uploads/3/9/3/8/3938813/jar.zip