openscad

Script-based modeling allows exact control over dimensions and easy parameter adjustments, enabling fully configurable and reproducible designs as demonstrated in the tree example.

Models are stored as plain text script files, making them ideal for Git and other version control systems, facilitating collaboration and change tracking.

Available for Linux, Windows, and macOS at no cost with an active open-source community, as highlighted in the download and build instructions.

Built on constructive solid geometry with union, intersection, and difference operations, providing reliable boolean modeling for mechanical parts.

Reads and writes common CAD formats like DXF for 2D outlines and STL for 3D printing, easing integration with other tools and workflows.