Hello and welcome to the website of the software DaoDesign.
DaoDesign is a completely free CAD software, but it is forbidden by the license to modify the software or sell.

So it can be used on all the following operating systems:

Creative Commons License

DaoDesign by Jérôme Clos is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License