If you are looking for "free" 3D CAD you are kind of limited in your choices:
1) Fusion 360 has a "free" version but it's limited.? It is available free to hobbyists and can be used professionally on a very limited basis, you have make less than $100K a year using it, and professionally you can only use it free for for a limited time.? I think that limited time is something like 3 years.? If your business makes more than $100K/year, or if you have been using it in your business for 3 years they will require you to purchase a subscription.? Fusion 360 uses Parametric Based modeling, and it is VERY powerful.? Some people find it easy to use, I didn't.? Most people that I have talked to, at least those that also have a long background in 2D CAD, seem to have a hard time with Fusion 360.? Fusion 360 needs an internet connection to verify your license, even though the software is installed on your machine.? The current "free" version of Fusion 360 also is less powerful than the "free" version before they went subscription.
2) DesignSpark 3D also has a "free" version.? DesignSpark is the software I used to learn 3D modeling, it is Direct Based modeling and is easier for some people to learn to use.? Last year the makers of DesignSpark decided to do the same thing that Autodesk did with Fusion 360, they switched to subscription.? The "free" version that they now offer is less powerful than their previous versions.? Both Fusion 360 and DesignSpark will deactivate your license if you don't use it often enough.? DesignSpark is less powerful than Fusion 360 and some times it felt like you had to force it to do what you wanted.? DesignSpark also needs an internet connection to verify your license, even though the software is installed on your machine.
3) FreeCAD is an Open-Source CAD package and as such is free to download and use with no restrictions.? It, like Fusion 360, is Parametric Based modeling.? FreeCAD? works, and there are a LOT of tutorials on how to use it.? I would recommend finding somebody whose tutorials that you like and stick with that person.? FreeCAD being open-sourced has had many developers, sometimes everything doesn't play well together.? ?At times it feels that you could ask 10 different people how to do the same thing in FreeCAD, get at least 12 different answers - and they'd ALL work.? It's very powerful, does a LOT of different things, but it can also be very confusing.
4) ONSHAPE also has a free version, and subscription versions.? It's cloud based and the free version requires you to make your work available to one and all.? I personally am not OK with that, so I don't use it but it's still there.
5) TinkerCAD and Sketch-up... I've seen people make some really fantastic stuff with these, but to me they didn't seem all that precise - so I never looked at them very hard.? I'm probably just biased because of a long 2D CAD experience with Autocad.
