[adrienthebo]

Onshape allows for versioning parts and assemblies, mate connectors to determine how parts should connect, assemblies and subassemblies to define the relationships between parts and allow for reuse, configurable parts (feature flags etc); it's extremely powerful and pleasant to use. Regrettably it's a closed source SaaS option but all of the open source CAD tools are grossly underpowered in comparison. There's nothing like KiCAD that'll let you get work done quickly effectively - at least in my experience.

[s1mon]

The kernel (Parasolid) is closed source as well as many of the back end bits of Onshape, but all the code behind the standard features that is written in FeatureScript is under an MIT license (the Onshape Standard Library).

https://cad.onshape.com/FsDoc/index.html