SketchUp, Blender, FreeCAD, Autodesk AutoCAD, SOLIDWORKS, Autodesk Fusion 360, Cura, LibreCAD, Catia, ZBrush, Vectorworks, ZWCAD, TurboCAD, Onshape, QCAD, Simplify3D, OpenSCAD, SmoothieControl, DoubleCAD XT, Geomagic Design X, Fablitec, IceSL, Repetier, Medusa4, 3D Object Converter, 3D Orchard, TrueSculpt, MeshLab, PlastiSketch, Online 3D Model Converter, Spacedraw, ReplicatorG, MatterControl, BRL-CAD, CAD Assistant, ideaMaker, ShapeShop, Slic3r, d3D Sculptor, Sculptfab, SDF 3D, Voxelizer, iDough, LiteCAD, BuildBee, CraftWare, scribble3d, PUPPICAD, 3DC.io, IronCAD, TouchCAD, CUR3D, PloppSL, KISSlicer, MultiCAD, ARES Commander, SuperSkein, CADopia, AllyCAD, Cycas, Mapsoft miniCAD are some alternatives to Microsoft 3D Builder.