I got so fed up with the free CAD tools that I started making my own. I'm a few months in and while it's still extremely experimental, It's almost useful.
Would it be cool if I posted about it there from time to time to try and get opinions on its interface and workflow? I'm of the opinion that it's still too young to advertise as a usable tool.
It's a script driven CAD program, inspired by OpenSCAD and CAD Query. It's most noteworthy features are dimensional type safety and automatic unit conversion.
You can see some samples in the readme: https://github.com/IamTheCarl/CommandCAD
Currently you can make STL files to feed your slicer (and two other formats)
My more near term goals are to export svgs of sketches and produce gcode suitable for laser cutters. My more long term goals are to produce gcode for a variety of machines, add a package manager (for importing libraries and other models), and an interactive editor.