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#2 FreeCAD
Open‑source parametric CAD platform with a powerful Python API, suitable for mechanical parts and complex assemblies.
#3 Blender
Free, open‑source 3D creation suite offering mesh modeling, sculpting, and scripting (Python) for printable designs.
#4 Fusion 360
Cloud‑based CAD/CAM tool from Autodesk that combines parametric modeling, sculpting, and integrated slicing for 3D printing.
#5 Tinkercad
Browser‑based, beginner‑friendly CAD with drag‑and‑drop shapes and basic parametric features; great for quick prints.
#6 Onshape
Professional, cloud‑native parametric CAD system with real‑time collaboration and version control.
#7 SketchUp
Intuitive 3D modeling software (free and paid tiers) with a large library of components; supports STL export.
#8 OpenJSCAD
JavaScript‑based, script‑driven CAD similar to OpenSCAD but runs in the browser and supports modern ES6 syntax.
#9 Antimony
Visual node‑based parametric modeling tool that generates OpenSCAD code underneath, offering a hybrid workflow.
#10 CadQuery
Python‑based parametric CAD library that produces STEP and STL files; ideal for developers who prefer code over UI.
#11 SolidPython
Python wrapper for OpenSCAD that lets you write OpenSCAD models using Python syntax and libraries.
#12 Rhino 3D
Powerful NURBS modeling suite with a strong plugin ecosystem (e.g., Grasshopper) for parametric design.
Visual programming language integrated with Rhino, enabling parametric and algorithmic modeling without writing code.
Free, easy‑to‑learn 3D modeling tool aimed at engineers, with direct STL export for 3D printing.
#15 Meshmixer
Free mesh editing and sculpting tool from Autodesk, perfect for repairing, hollowing, and customizing printable models.
#16 3D Slash
Block‑based, game‑like modeling environment that lets beginners create printable geometry quickly.
#17 Vectary
Web‑based 3D design platform with real‑time collaboration, parametric modifiers, and direct 3D printing export.
#18 SculptGL
Lightweight, browser‑based sculpting tool for creating organic shapes that can be exported as STL.
#19 ZBrushCoreMini
Free version of ZBrush focused on digital sculpting; models can be exported for 3D printing.
#20 SolidWorks
Industry‑standard parametric CAD suite (paid) with robust simulation, assembly, and STL export capabilities.
#21 Alibre Design
Affordable mechanical CAD software with parametric modeling, sheet metal tools, and direct 3D printing export.