SolveSpace

SolveSpace is a versatile, free parametric 3D CAD tool ideal for a range of applications. It allows users to model 3D parts using extrudes, revolves, and Boolean operations, and 2D parts with export options like DXF, PDF, and SVG. Perfect for 3D printing, it exports STL files compatible with most printers. SolveSpace also prepares CAM data, exporting 2D vector art for waterjet or laser cutting, and generates STEP or STL files for third-party CAM software.

For mechanism design, it features a constraint solver to simulate linkages with various joints. SolveSpace replaces manual trigonometry with live dimensioned drawings, enhancing both plane and solid geometry tasks. This tool is an excellent choice for engineers and designers seeking a robust, open-source solution.