The team that started SolidWorks has come out with a new 3D design/CAD system called OnShape. It does a lot of what SolidWorks does, and if you know SW or another 3D modeling system you'll probably find as I did that it's easy to pick up. You can also upload SW parts and assemblies and translate them faithfully to onshape equivalents. The big difference here is that the software runs in the cloud and the screen tool is your browser. Nothing to install or update. The free subscription limits you to 5 active "documents" at a time, but an OnShape document is an entire project of parts, assemblies, and any other supporting docs that you want to include. Your documents are held in the cloud, but they can be downloaded and saved. onshape.com for tutorials and to sign up. There's also a support forum.