Hi All! After attending a short course on 3D printing at SLAS, I wanted to share some free CAD programs that I was not aware about. We have 3D printers and I have played around with slicing parameters before, but was unable to design anything due to a limited # of licenses for the NX CAD software we have. These options will allow me to learn a little more about design, which I am looking forward to, as our 3D printers have saved us before in the past in supporting our liquid handlers.
Also used Fusion 360 for a few years now, both under academic license and hobby (both are free but the academic is a full fledged version only obtainable with an academic email).
The software is by far the most potent and intuitive, for its capabilities, I came to tinker with (including the ones you mention above). And as Luis mentioned above, there is a wealth of resources and tutorials out there.