3D and CAD/CAM Models

3D Modeling

 * 3DMF - QuickDraw 3D Metafile (.3dmf)
 * 3DM - OpenNURBS Initiative 3D Model (used by Rhinoceros 3D) (.3dm)
 * 3DS - Legacy 3D Studio Model (.3ds)
 * AC - AC3D Model (.ac)
 * AMF - Additive Manufacturing File Format
 * Adobe PRC (embedded in PDF files)
 * AN8 - Anim8or Model (.an8)
 * AOI - Art of Illusion Model (.aoi)
 * B3D - Blitz3D Model (.b3d)
 * BLEND - Blender (.blend)
 * BLOCK - Blender encrypted blend files (.block)
 * BRL-CAD geometry (.g)
 * C4D - Cinema 4D (.c4d)
 * Cal3D - Cal3D (.cal3d)
 * CCP4 - X-ray crystallography voxels (electron density)
 * CFL - Compressed File Library (.cfl)
 * COB - Caligari Object (.cob)
 * CORE3D - Coreona 3D Coreona 3D Virtual File(.core3d)
 * CTM - OpenCTM (.ctm)
 * DAE - COLLADA (.dae)
 * DFF - RenderWare binary stream, commonly used by Grand Theft Auto III-era games as well as other RenderWare titles
 * DPM - deepMesh (.dpm)
 * DTS - Torque Game Engine (.dts)
 * EGG - Panda3D Engine
 * FACT - Electric Image (.fac)
 * FBX - Autodesk FBX (.fbx)
 * GLM - Ghoul Mesh (.glm)
 * JAS - Cheetah 3D file (.jas)
 * LWO - Lightwave Object (.lwo)
 * LWS - Lightwave Scene (.lws)
 * LXO - Luxology Modo (software) file (.lxo)
 * MA - Autodesk Maya ASCII File (.ma)
 * MAX - Autodesk 3D Studio Max file (.max)
 * MB - Autodesk Maya Binary File (.mb)
 * MD2 - Quake 2 model format (.md2)
 * MD3 - Quake 3 model format (.md3)
 * MDX - Blizzard Entertainment's own model format (.mdx)
 * MESH - New York University(.m)
 * MESH - Meshwork Model (.mesh)
 * MM3D - Misfit Model 3d (.mm3d)
 * MPO - Multi-Picture Object - This JPEG standard is used for 3d images, as with the Nintendo 3DS
 * MRC - voxels in cryo-electron microscopy
 * NFF - Haines NFF, Neutral File Format
 * NIF - Gamebryo NetImmerse File (.nif)
 * OBJ - Wavefront .obj file (.obj)
 * OFF (Object File Format)
 * POV - Persistence of Vision, POV-Ray document (.pov)
 * PRT scene description (Parallel Ray Trace)
 * QRT Ray Tracer scene description (.qrt)
 * Radiance Scene Description (.rad)
 * Rayshade scene description (.ray)
 * RWX - RenderWare Object (.rwx)
 * Sense8 NFF (WorldToolkit Neutral File Format)
 * SGI YAODL (Yet Another Object Description Language, Power-Flip Format)
 * SGO - Silicon Graphics Object, Showcase
 * SIA - Nevercenter Silo Object (.sia)
 * SIB - Nevercenter Silo Object (.sib)
 * SKP - Google Sketchup file (.skp)
 * SLDASM - SolidWorks Assembly Document (.sldasm)
 * SLDPRT - SolidWorks Part Document (.sldprt)
 * SMD - Valve Studiomdl Data format. (.smd)
 * TDDD - Turbo Silver 3D Data Description, T3D
 * U3D - Universal 3D file format (.u3d)
 * VRML97 - VRML Virtual reality modeling language (.wrl)
 * VUE - Vue scene file (.vue)
 * WINGS - Wings3D (.wings)
 * X - DirectX 3D Model (.x)
 * X3D - Extensible 3D (.x3d)
 * Z3D - Zmodeler (.z3d)

CAD

 * 3dmlw - (3D Markup Language for Web) files
 * 3dxml - Dassault Systemes graphic representation
 * ACP - VA Software VA - Virtual Architecture CAD file
 * AMF - Additive Manufacturing File Format
 * Argon - Ashlar-Vellum (AR) - 3D Modeling
 * ART - ArtCAM model
 * ASC - BRL-CAD Geometry File (old ASCII format)
 * ASM - Solidedge Assembly, Pro/ENGINEER Assembly
 * BIN, BIM - Data Design System DDS-CAD
 * CCC - CopyCAD Curves
 * CCM - CopyCAD Model
 * CCS - CopyCAD Session
 * CAD - CadStd
 * CATDrawing - CATIA V5 Drawing document
 * CATPart - CATIA V5 Part document
 * CATProduct - CATIA V5 Assembly document
 * CATProcess - CATIA V5 Manufacturing document
 * cgr - CATIA V5 graphic representation file
 * CO - Ashlar-Vellum Cobalt - parametric drafting and 3D modeling
 * DRW - Caddie Early version of Caddie drawing - Prior to Caddie changing to DWG
 * DWG - AutoCAD and Open Design Alliance applications
 * DFT - Solidedge Draft
 * DGN - MicroStation design file
 * DGK - Delcam Geometry
 * DMT - Delcam Machining Triangles
 * DXF - ASCII Drawing Interchange file format - AutoCAD
 * DWB - VariCAD drawing file
 * DWF - AutoDesk's Web Design Format; AutoCAD & Revit can publish to this format; similar in concept to PDF files; AutoDesk Design Review is the reader
 * Euclid - CAD file format
 * Euclid - CAD/composition file format (Ace Computing)
 * EMB - Wilcom ES Designer Embroidery CAD file
 * ESW - Agtek format
 * EXCELLON - Excellon file
 * EXP - Drawing Express file format
 * FM - FeatureCAM Part File
 * FMZ - FormZ Project file
 * G - BRL-CAD Geometry File
 * GERBER - Gerber file
 * GLM - KernelCAD model
 * GRB - T-FLEX CAD File
 * GTC - GRAITEC Advance file format
 * IAM - Autodesk Inventor Assembly file
 * ICD - IronCAD 2D CAD file
 * IDW - Autodesk Inventor Drawing file
 * IFC - buildingSMART for sharing AEC and FM data
 * IGES - Initial Graphics Exchange Specification
 * Intergraph Standard File Formats
 * IPN - Autodesk Inventor Presentation file
 * IPT - Autodesk Inventor Part file
 * JT (visualization format) - Jupiter Tesselation
 * MCD - Monu-CAD (Monument/Headstone Drawing file)
 * model - CATIA V4 part document
 * OCD - Orienteering Computer Aided Design (OCAD) file
 * OpenSCAD - Solid 3D CAD objects (.scad)
 * PAR - Solidedge Part
 * PIPE - PIPE-FLO Professional Piping system design file
 * PLN - ArchiCad project
 * PRT - NX (recently known as Unigraphics), Pro/ENGINEER Part, CADKEY Part
 * PSM - Solidedge Sheet
 * PSMODEL - PowerSHAPE Model
 * PWI - PowerINSPECT File
 * PYT - Pythagoras File
 * SKP - SketchUp Model
 * RLF - ArtCAM Relief
 * RVT - AutoDesk Revit project files
 * RFA - AutoDesk Revit family files
 * SCDOC - SpaceClaim 3D Part/Assembly
 * SLDASM - SolidWorks Assembly drawing
 * SLDDRW - SolidWorks 2D drawing
 * SLDPRT - SolidWorks 3D part model
 * dotXSI - Softimage
 * STEP - Standard for the Exchange of Product model data
 * STL - Stereo Lithographic data format used by various CAD systems and stereo lithographic printing machines. (.stl)
 * TCT - TurboCAD drawing template
 * TCW - TurboCAD for Windows 2D and 3D drawing
 * Thing file - MakerBot (.thing)
 * UNV - I-DEAS I-DEAS (Integrated Design and Engineering Analysis Software)
 * VC6 - Ashlar-Vellum Graphite - 2D and 3D drafting
 * VLM - Ashlar-Vellum Vellum, Vellum 2D, Vellum Draft, Vellum 3D, DrawingBoard
 * VS - Ashlar-Vellum Vellum Solids
 * WRL - Similar to STL, but includes color. Used by various CAD systems and 3D printing rapid prototyping machines. Also used for VRML models on the web.
 * XE - Ashlar-Vellum Xenon - for Associative 3D Modeling

Links

 * 3D-printed semi-automatic gun
 * 3D-printed gun successfully fired
 * 3-D printing in prosthetics
 * 3D-printable artificial fingers
 * 3D-printed personalized Star Trek figurines
 * The 4 worst things people are making with 3D printers
 * EFF: Stop bad 3D printing patents
 * Don't let patents kill 3D printing
 * 4D printing (the 4th dimension is time)
 * RepRap: project to build self-replicating 3D printer
 * 3-D food 'printer' aims to end world hunger, starting with pizza
 * Baby's Life Saved With Groundbreaking 3-D Printed Device That Restored His Breathing
 * How 3-D printing will rebuild reality
 * Fixing New York City infrastructure with 3D-printed concrete
 * Kickstarting a $400 "appliance" 3D printer
 * With 3D printing, you’ll be able to replicate the world’s famous sculptures
 * Cortex 3D-printed cast
 * Superman invents 3D printing in 1964!
 * Forget 3D printing—3D subtraction is going to arrive in your garage first