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#2 FreeCAD
Open‑source parametric 3‑D modeler with a modular architecture; great for mechanical parts, assemblies, and sheet metal.
Web‑based version of SketchUp offering intuitive push‑pull modeling for quick 3‑D concepts and architectural sketches.
#4 Tinkercad
Browser‑based, beginner‑friendly 3‑D design tool with drag‑and‑drop shapes; perfect for quick prototypes and 3‑D printing.
Autodesk’s powerful cloud‑based CAD/CAM suite offered free to hobbyists, makers, and students for non‑commercial projects.
Full‑featured cloud CAD platform with parametric modeling and collaboration; free tier requires public documents.
#7 Blender
Open‑source 3‑D creation suite; while focused on animation, it includes robust modeling, sculpting, and rendering tools for designers.
#8 OpenSCAD
Script‑based 3‑D CAD program where models are defined by code; ideal for precise, parametric parts and generative design.
#9 LibreCAD
Free 2‑D CAD application for drafting mechanical drawings, floor plans, and schematics; supports DXF import/export.
Open‑source 2‑D CAD system with a clean interface; suitable for technical drawings and simple schematics.
#11 SolveSpace
Parametric 3‑D CAD program focused on constraint‑based modeling, assemblies, and basic CAM export.
Free 3‑D modeling tool from RS Components; offers direct editing, part libraries, and easy export for 3‑D printing.
#13 BRL‑CAD
Mature open‑source solid modeling system used by the U.S. military; supports constructive solid geometry (CSG).
#14 NanoCAD Free
Windows‑based 2‑D drafting tool with a familiar AutoCAD‑like UI; supports DWG files and basic annotation tools.
#15 OpenJSCAD
Web‑based, JavaScript‑driven parametric modeling environment; write code to generate 3‑D models directly in the browser.
#16 3D Builder
Microsoft’s free Windows 10 app for simple 3‑D modeling, mesh repair, and direct printing to compatible printers.
#17 KiCad
Open‑source EDA suite that includes a PCB layout editor and a basic 3‑D viewer; useful for electronics hobbyists.
#18 Sweet Home 3D
Free interior design application that lets hobbyists create 2‑D floor plans and preview them in 3‑D.