ShapeForge Free

ShapeForge Free is a 3D parametric modeling tool that lets users define constraints (length, angle) to control geometry. The interface includes a feature tree to reorder or edit operations. ShapeForge supports direct editing of faces or edges, bridging parametric and direct approaches. Basic assembly constraints allow multiple parts to mate. A file conversion utility handles IGES and STEP. Suited for hobbyists or small projects wanting parametric control plus assembly constraints in a free environment.