| .001 | Smith Micro Software | Backup Files | Split Archive File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .002 | Various Developers | Backup Files | Split Archive Part 2 File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .003 | Welltek Software | Backup Files | Split Archive Part 3 File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .004 | SourceForge | Compressed Files | Compressed File From A Multi-volume Archive (part 4) | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .005 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .006 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .007 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .008 | ESRI (Environmental Systems Research Institute) | GIS Files | International S-57 Hydrographic Data Electronic Navigation Chart | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .009 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .010 | bhv | Data Files | Winfunktion Mathematik V8.0 Julia Fractal File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .2D | Archway Systems | CAD Files | VersaCAD 2D Drawing File | Amapi 3D | Smith Micro Software |
| .A3D | AlternativaPlatform | 3D Image Files | Alternativa Player 3D Export File | Amapi 3D | Smith Micro Software |
| .ANIME | Smith Micro Software | Data Files | Anime Studio Document | Smith Micro Moho Debut 12 | Smith Micro Software |
| .APK | Google | Compressed Files | Android Package File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .APPLE | Apple | Data Files | Apple AppleSingle Data File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ARC | Symantec Corporation | Backup Files | Norton Backup Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ARJ | Robert K. Jung | Compressed Files | ARJ Compressed File Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .B2A | Smith Micro Software | Encoded Files | Btoa Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .B64 | Smith Micro Software | Compressed Files | Base64 MIME-Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BHX | Open Source | Encoded Files | BinHex Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BIN | Unknown Developer | Disk Image Files | Binary Disk Image File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BTOA | Smith Micro Software | Encoded Files | Binary-to-ASCII Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZ | Smith Micro Software | Compressed Files | Bzip Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZ2 | Julian Seward | Compressed Files | Bzip2 Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .BZIP2 | Julian Seward | Compressed Files | Bzip2 Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CAB | Microsoft Corporation | System Files | Windows Cabinet File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CB7 | Smith Micro Software | Compressed Files | Comic Book 7-Zip Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBR | Unknown Developer | Compressed Files | Comic Book RAR Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBT | Various Developers | Compressed Files | Comic Book TAR File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CBZ | Open Source | 3D Image Files | Comic Book Zip Archive File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CM2 | Smith Micro Software | 3D Image Files | Poser Camera Set File | Smith Micro Poser | Smith Micro Software |
| .CPT | Corel | Raster Image Files | Corel Photo-Paint Image | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .CR2 | Canon Inc. | Camera Raw Files | Canon Digital Camera Raw Image File | Poser | Smith Micro Software |
| .CRZ | Smith Micro Software | 3D Image Files | Compressed Poser Character Rigging File | Smith Micro Poser | Smith Micro Software |
| .CST | Smith Micro Software | Page Layout Files | Manga Studio Story File | Manga Studio | Smith Micro Software |
| .EFW | Corel | Compressed Files | Renamed Zip Or Executable File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .ENC | Smith Micro Software | Encoded Files | Encoded Data File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .FC2 | Smith Micro Software | 3D Image Files | Poser Face Pose File | Smith Micro Poser | Smith Micro Software |
| .FMC | Interscape | Data Files | FormConnect Form File | MotionArtist | Smith Micro Software |
| .FMD | Smith Micro Software | Data Files | MotionArtist Document File | MotionArtist | Smith Micro Software |
| .GTAR | Free Software Foundation | Data Files | GNU Tar Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .GZ | GNU Project | Compressed Files | Gnu Zipped Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HBX | Open Source | Encoded Files | BinHex Encoded File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HD2 | Smith Micro Software | 3D Image Files | Poser Hand Pose File | Poser | Smith Micro Software |
| .HEX | Intel Corporation | Developer Files | Hexadecimal Source File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .HFX | Smith Micro Software | Data Files | HotFax Data File | HotFax | Smith Micro Software |
| .HR2 | Smith Micro Software | 3D Image Files | Poser Hair File | Smith Micro Poser | Smith Micro Software |
| .HRZ | Unknown Developer | Graphic Files | Slow Scan TeleVision File (SSTV) | Poser | Smith Micro Software |
| .LHA | WinAbility Software | Compressed Files | LHARC Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LHARC | WinAbility Software | Compressed Files | LHARC Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LT2 | Smith Micro Software | 3D Image Files | Poser Light Set File | Smith Micro Poser | Smith Micro Software |
| .LWO | NewTek | 3D Image Files | LightWave 3D Object File | Poser | Smith Micro Software |
| .LZH | Various Developers | Compressed Files | LZH Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .LZMA | Igor Pavlov | Compressed Files | LZMA Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MAP | id Software | Game Files | Quake Engine Map File | Poser | Smith Micro Software |
| .MC5 | Smith Micro Software | 3D Image Files | Poser 5 Material File | Smith Micro Poser | Smith Micro Software |
| .MC6 | Smith Micro Software | Graphic Files | Poser 6 Material File | Poser | Smith Micro Software |
| .MCWORLD | Smith Micro Software | Game Files | Minecraft World Backup File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MIM | Internet Engineering Task Force | Encoded Files | Multi-Purpose Internet Mail Message File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MIME | Various Developers | Encoded Files | Multi-Purpose Internet Mail Extension | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MME | Smith Micro Software | Encoded Files | Multipurpose Internet Mail Extensions | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .MOHO | Smith Micro Software | Data Files | Moho Animation Project | Smith Micro Moho Debut 12 | Smith Micro Software |
| .MOR | Corel | Data Files | Corel Shared Writing Tools Data | Poser | Smith Micro Software |
| .OBZ | Smith Micro Software | 3D Image Files | Compressed 3D Object File | Poser | Smith Micro Software |
| .PAK | Unknown Developer | Game Files | Video Game Package | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PET | Larry Short, Mick Amadio and Puppy community | Compressed Files | Puppy Linux Install Package | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PF | Smith Micro Software | Compressed Files | Private File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PIT | Samsung Electronics | System Files | Samsung Phone Firmware File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PIZ | Winrar | Compressed Files | Zipped File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .PMD | Adobe Systems Incorporated | Page Layout Files | PageMaker Document | Poser | Smith Micro Software |
| .PP2 | Pingman Tools | Data Files | PingPlotter Data File | Smith Micro Poser | Smith Micro Software |
| .PPZ | Smith Micro Software | 3D Image Files | Compressed Poser Prop File | Smith Micro Poser | Smith Micro Software |
| .PZ2 | Smith Micro Software | 3D Image Files | Poser Pose File | Smith Micro Poser | Smith Micro Software |
| .PZ3 | Smith Micro Software | 3D Image Files | Poser Scene File | Poser | Smith Micro Software |
| .PZZ | Smith Micro Software | 3D Image Files | Poser Compressed Scene File | Poser | Smith Micro Software |
| .R00 | Rocky Sand Studio | Compressed Files | WinRAR Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R06 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R07 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R09 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R30 | Eugene Roshal | Compressed Files | WinRAR Split Archive Part 30 | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R36 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .R50 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .RAR | Rocky Sand Studio | Compressed Files | WinRAR Compressed Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .RSR | Smith Micro Software | Raster Image Files | Poser Model Preview File | Smith Micro Poser | Smith Micro Software |
| .S07 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .S09 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .S7Z | Igor Pavlov | Compressed Files | 7-Zip Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SEA | Smith Micro Software | Compressed Files | Self-Extracting Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SIT | Smith Micro Software | Compressed Files | StuffIt Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SITX | Smith Micro Software | Compressed Files | StuffIt X Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .SMV | Smith Micro Software | Video Files | VideoLink Mail Video File | Smith Micro Videolink Pro | Smith Micro Software |
| .SOW | Interplay Entertainment | Game Files | Descent ARJ Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TAR | Jean-loup Gailly and Mark Adler | Data Files | Consolidated Unix File Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TAZ | Smith Micro Software | Compressed Files | Tar Zipped File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TBZ2 | Winrar | Compressed Files | Tar BZip 2 Compressed File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TG | Julian Gabriel Casadesus and Others | Audio Files | TuxGuitar Document | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TGZ | Various Developers | Compressed Files | Gzipped Tar File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TIG | Texas Instruments, Inc. | Backup Files | TI Connect Backup File | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .TZ | Smith Micro Software | Compressed Files | Compressed Tar Archive | Smith Micro StuffIt Deluxe | Smith Micro Software |
| .U3D | 3D Industry Forum | 3D Image Files | Universal 3D File | Smith Micro Poser | Smith Micro Software |
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