If you&#x27;re looking for a more “serious” CAD package without paying “serious” money, check out OnShape and Fusion 360. Both of these packages are industrial-strength CAD (parametric, history-based, and constraint-solving) and can be used for free.<p>OnShape (<a href="https:&#x2F;&#x2F;www.onshape.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.onshape.com&#x2F;</a>) has a frontend that runs entirely in the browser on the desktop, so you can even run it on Linux, and has apps with real create&#x2F;edit capability for phones and tablets.<p>If OnShape doesn&#x27;t have everything you want, or you run into its storage limits and don&#x27;t want to pay for more space, check out Fusion 360. It&#x27;s free for hobbyists. It only runs on Mac and Windows, but it&#x27;s got a ton more features than OnShape and no storage limits.<p>I played with Fusion 360 before I found OnShape and wasn&#x27;t able to make much headway, even after checking out some of Autodesk&#x27;s training videos. When I found OnShape, I watched its training videos and got a handle on the basic CAD concepts. When I ran into OnShape&#x27;s limits, I was able to go back to Fusion 360 and understand it.  Now I use Fusion 360 to design parts for hobby-level 3D printing and it&#x27;s great.