Downloadable 3D Polygonal Mesh file formats available:
3ds Max (.max), Wavefront (.obj), Autodesk FBX (.fbx), Blender (.blend), Cinema 4D (.c4d).
Downloaded 3D Models can be used in 3ds Max, Blender, Maya, Lightwave, Softimage, Cinema 4D, Houdini, Daz Studio, Modo, Unity 3D, Unreal Engine, SketchUp, ZBrush, Poser and other 3D modeling software.
The following file formats can be exported from these above programs: 3D Studio (.3ds), Alembic (.abc), AutoCAD (.dxf, .dwg), COLLADA (.dae), Microsoft DirectX Direct3D (.x), glTF 2.0 WebGL (.glb, .gltf), Stanford (.ply), StereoLithography (.stl), Universal Scene Description (.usd, .usdc, .usda), VRML97 (.wrl), X3D Extensible 3D (.x3d).
Downloadable 3D CAD Solid Object file formats available:
STEP SOLID [AP214] (.step), IGES 5.3 NURBS (.iges). 3D CAD Solids can be imported into
SolidWorks (.sldasm; .sldprt), Autodesk Inventor (.iam; .ipt),
Pro/Engineer (.asm; .prt), PTC Creo, Siemens NX, Fusion 360, SolidEdge, CATIA, ACIS and other CAD/CAM/CAE packages. 3D
CAD models can be downloaded as polygonal 3D meshes also.