3d Printing & Modeling
I've been creating parametric 3D models for several years now, working with OpenSCAD, FreeCAD, and OnShape.
All models are highly configurable, offering numerous customization options to meet specific needs.
Models:

Thin Wall Calibration - Custom model for calibrating any FDM printer nozzle size.

The Mosney Connector - Connects outer sleeved components while allowing passthrough of inner connections.

Asteroid/Rock Generator - Uses an interesting technique of randomly placing spheres, then creating a hull around them.

Lock Pick Handle - Customizable handle for cost-effective lock pick sets that don't include handles, or any tool with a flat tang that could use a handle.

Cable Strain Relief - A utilitarian print designed to grab the area around a fraying wire section and transfer stress around the damaged area. Extends the life of damaged wires by protecting frayed sections.

Device Cradle - Designed to make phones easier to pick up. The slippery, small form factor of modern phones inspired this modification of the 4-sided tray design. Works with any phone due to its configurability.

Incense Burner - One of my first models. A simple rotational extrusion, similar to throwing a clay pot. Catches ashes and accommodates multiple incense sticks.

4 Sided Tray - The first model where I 100% composed the mesh programmatically; essentially one large polygon with manually stitched triangles.

Round Tray - Similar to the 4-sided tray, but uses circular geometry to allow any number of sides. Triangle tray? 3 sides. Square? 4. Hexagon? 6. Round? As many sides as rendering time allows.