CAD

From the article:

Note: as a for-profit company, we are certainly interested in knowing what users are willing to pay for. If we’re going to survive, we have to do that. But that was not our primary motivation in asking these specific questions. FreeCAD is not only free-as-in-speech, it’s also free-as-in-beer. We wanted to know if that was the main reason that people use it.

Our thinking is that if users are willing to sacrifice financially to make the software better, then it means they value the ‘free-as-in-freedom’ aspect of FreeCAD even more. It would give us confidence that we can build a business model that gives users real value and is also financially sustainable. We were blown-away by the results.