Alphabetic File Extension List

The file extension list you requested is shown on this page. It loads as a table so please give it a moment as some of the lists are quite long. These lists contain basic information: the extension, the name of the program it works with, the specific function of the file, and the company that makes the program. Not all extensions have all of the data. Click on the extension of interest to see the detail page for that extension. Total extensions in this particular list: 545.

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Extension Information
X Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
X Xview Object
X Stardent AVS X Image
X LEX Program File
X Direct3D Object (Microsoft Corporation)
X Amapi 3D Modeling
X Alysis SuperDisk Self-extracting Archive
X REXX Script (IBM)
X XBLite Program File
X FPS Creator Model (The Game Creators Ltd.)
X01 Paradox Secondary Index
X02 Paradox Secondary Index
X03 Paradox Secondary Index
X04 Paradox Secondary Index
X05 Paradox Secondary Index
X06 Paradox Secondary Index
X07 Paradox Secondary Index
X08 Paradox Secondary Index
X09 Paradox Secondary Index
X1 X1 Desktop Search Saved Search File (X1 Technologies, Inc.)
X10 X Window Dump Bitmap
X11 X Windows System Window Dump Bitmap
X13 Hooligans
X16 Macromedia Program Extension
X28 Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
X32 Macromedia Program Extension (Macromedia)
X3D X3D File (Web3D Consortium)
X3D Xara 3D Project File (Xara)
X3DB X3D Binary Format File (Web3D Consortium)
X3DBZ X3D GZipped Binary Format File (Web3D Consortium)
X3DV X3D Classic VRML File (Web3D Consortium)
X3DVZ X3D GZipped Classic VRML File (Web3D Consortium)
X3F Sigma Camera RAW Picture File (Sigma)
X4M TeamLinks Mail File Data
X5 Rockwell Software Logix 5 File
X64 C64 Emulator Disk Image
X83 GAEB 2000 XML and DA XML File (Bundesamt für Bauwesen und Raumordnung)
XA The Sims Extensive Audio (Electronic Arts (Maxis))
XA Extended Architecture File
XA Playstation Video (Sony Corporation of America)
XA Gear CD Suite File
XA2 Exam Editor Question Groups (Nice Productions)
XAB Mail Address Book (Microsoft Corporation)
XAB Xenis Mail Address Book
XAC GNUCash GNUCash Backup File (The GNUCash Project)
XACT XactScript File (XactCommerce)
XAD eXotic AdLib Format
XADML XML-based Application Description Information
XAF Affirm Transcript Editor Affirm Transcript Editor
XAML Windows Presentation Foundation Object Model XML-based Markup Language (Microsoft Corporation)
XAN XANIA Browser
XAN xyALGEBRA File
XAP Silverlight Application Package (Microsoft Corporation)
XAP Xbox Dashboard Script (Microsoft Corporation)
XAP Elonex ONEt+ Application File (Elonex)
XAR Xara X Vector Drawing (Xara Group Limited)
XAR Excel AutoRecover File (Microsoft Corporation)
XAR Corel Xara Drawing
XAR eXtensible ARchiver Archive
XARC The Longest Journey Sound File (Funcom)
XAS Playstation Video (Sony Corporation of America)
XBA xBase Website Code (Mauricio Fragoso)
XBA Timespace X200/K200 Digital Video Recorder Video File (Timespace Technology Ltd.)
XBAP Silverlight Application Package (Microsoft Corporation)
XBE Xbox Executable (Microsoft Corporation)
XBEL XML Bookmark Exchange Language (XBEL) File (SIG for XML Processing in Python)
XBF Emperor Battle for Dune
XBF Database File
XBIN RegSupreme License File (Macecraft Software)
XBK SMART Board Slide Collection (SMART Technologies Inc.)
XBL XBLite Program File
XBL Extensible Binding Language
XBM X Bitmap Graphic
XBP XBWML X-Bite.co.uk Markup Language (X-Bite.co.uk)
XBS ETAK MapBase
XBW Crossword
XBX XBox Image File (Microsoft Corporation)
XB~ IC File
XC X Server Constant Screen Image Bitmap
XC2 HPXView DACCS Configuration (Haliplex Communication Systems)
XCD WarpIN CID (Configuration, Installation, Distribution) File
XCDATAMODEL Xcode Core Data-based Data Model (Apple Inc.)
XCF GIMP Image File (The GIMP Team)
XCI Acrobat Font Mapping File (Adobe Systems Incorporated)
XCK Extended Crack File
XCL Xtree for Win Script
XCM CmapTools Exported Concept Map (IHMC)
XCMD Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XCMDS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XCN HPXView DACCS Configuration (Haliplex Communication Systems)
XCODEPROJ Xcode Project (Apple Inc.)
XCP Xbox Compressed Package (Microsoft Corporation)
XCR Warlords Battlecry (Strategic Studies Group, Pty Ltd.)
XCS BuzzLetter Encrypted Stationery Template (StationeryCentral.com, Inc.)
XCT XVI32 Conversion File (Christian Maas)
XCU OpenOffice.org Extension Control File (OpenOffice.org Community)
XCZ BuzzLetter Zipped Collection of Encrypted Stationery Templates (StationeryCentral.com, Inc.)
XD CCS-lib.2 Examples Motif-CC File
XDB Norton AntiVirus Update File (Symantec Corporation)
XDB xText Compiled Database (Flambeaux Software)
XDB HyperCD HyperLOCK (John Galt Media, Inc.)
XDC Acrobat Printer Description (Adobe Systems Incorporated)
XDC DarkCrypTC Encrypted File Container (DarkSoftware (Alexander Myasnikov, Kolchugino))
XDD xfit XDD Format Data File
XDE Tgif-3.0 File
XDELTA Xdelta Binary Differential File
XDF Milnta APL Transfer Function
XDF Extended Disk Format Image
XDF X68000 Image File
XDF Workshare Synergy File
XDF ProWORX Nxt Extended Memory Data (Schneider Electric)
XDI WinArchiver WinArchiver (WinArchiver Computing, Inc.)
XDIM Multi-Channel Server (MCS) Markup Editor XDIME Document (Volantis Systems Ltd.)
XDK XML Development Kit Project (Republicorp Virtual Media)
XDO OutDo Outline File (Aspevia Systems)
XDO Oracle BI Publisher Resource Tracking File (Oracle)
XDP UNIX File
XDP Playstation Media Manager For PSP File (Sony Computer Entertainment Inc.)
XDP Acrobat XML Data Package File (Adobe Systems Incorporated)
XDQ Harvest Log File (Hydro-Logic Ltd, Isodaq Division)
XDR BizTalk XML-Data Reduced Schema (Microsoft Corporation)
XDRUID XDIME Player Skin (Volantis Systems Ltd.)
XDR_TOR Insight II Binary Torsion File (Accelrys Software Inc.)
XDS Nintendo DS Game Maker Project File (Invisionsoft)
XDS XDS X-ray Detector Software
XDS LCDStudio Design (LCDStudio.com)
XDS OpenGL Performer Script
XDS Symantec Store Download Manager Partial Download (Symantec Corporation)
XDSL D-Link Router UK Firmware Update File (D-Link Systems, Inc.)
XDT Xscript Data Packet (Codec Games)
XDW Milnta APL Transfer Function
XDW DocuWorks File (Fuji Xerox Co., Ltd.)
XEA Cryptomax Encrypted Archive (Cryptomax.net)
XEB Apabi eBook
XEC Afaria (XcelleNet)
XEE Expression Encoder Preset File (Microsoft Corporation)
XEF eManager Form Data (X-Genics Ltd.)
XEJ Expression Encoder Job File (Microsoft Corporation)
XEL Expression Encoder Log File (Microsoft Corporation)
XEM eManager Metering Unit Credits for File Use (XGenics Ltd.)
XEN Xenu's Link Sleuth Saved Results File (Tilman Hausherr)
XEP XenoDream Graphics Data (XenoDream Software, LLC.)
XEP eManager File Packing Definition (XGenics Ltd.)
XER Primavera Project Management Propriety Exchange Format (Primavera Systems, Inc)
XES eManager XML UI Definition for Skins (XGenics Ltd.)
XET eManager XML Definition of eManager Process (XGenics Ltd.)
XEV eManager XML Autoupdate Definition (X-Genics Ltd)
XEX XeX Web Page Definition
XEX KERMIT Control File
XEX Xbox Executable (Microsoft Corporation)
XEX Renamed .EXE File
XEZ eManager Template Package (X-Genics Ltd.)
XFB LonMark Binary Device Interface File Format (LonMark International)
XFC X-Fonter Font Collection File (Blacksun Software)
XFC Docuprint N17 Printer Firmware (Xerox)
XFD Atari Disk Image (Atari)
XFD XML Form in XFDL Format
XFD Acu4GL Extended File Description (Acucorp, Inc.)
XFDF Acrobat Forms Document (Adobe Systems Incorporated)
XFDL XML Form in XFDL Format
XFI LaTex Figures File
XFI xICE Desktop Encrypted File (Network At Home Enterprises)
XFL Flash CS4 Exchange Format (Adobe Systems Incorporated)
XFL xICE Desktop Encrypted Folder (Network At Home Enterprises)
XFM OmniForm XML Format
XFM Audition Transform Effect (Adobe Systems Incorporated)
XFN Ventura Printer Font
XFO LonMark Optimized Device Interface File (LonMark International)
XFR Symantec Anti-Virus Corporate Version Failed Update (Symantec Corporation)
XFR Xfrog Vegetation File (greenworks organic-software)
XFR Ventura Publisher Bitmap Editor Font File
XFS Wolfteam Game File (Softnyx)
XFS GunBound (Softnyx)
XFS eRacer Sound File
XFT ChiWriter 24 Pin Printer Font
XFT LiveCycle Designer Form (Adobe Systems Incorporated)
XFX Fax File
XG XG Encryption Encryption (Mastermind Technology)
XG0 Database Index; Paradox Secondary Index
XG1 Database Index; Also XG2, XG3...
XG1 Techno Toys XG-909 MIDI Drum Machine File
XG2 Database Index; Also XG3, XG4…
XG3 Database Index; Also XG4, XG5…
XG4 Database Index; Also XG5, XG6…
XG5 Database Index; Also XG6, XG7…
XG9 Techno Toys XG-909 MIDI Drum Machine File
XGL MegaBitz Graphics Language File
XGM Techno Toys XG-909 MIDI Drum Machine File
XGO Paradox Database-related File
XGO GeoConcept Add-On (GeoConcept SA)
XGO LogMate for Windows File
XGP PicturePlayer Password Protected Files (PicturePlayer)
XGR Graph Edit XML Graph (Filter Graph Markup Language) (Microsoft Corporation)
XGS PicturePlayer Scrambled Files (PicturePlayer)
XGS XACT XACT Global Settings (Microsoft Corporation)
XGZ MegaBitz Vector Drawing
XHD HappyFish XML Data File (ThirstyCrow)
XHDML XML Version of HDML File
XHESSIAN Insight II Hessian File (Accelrys Software Inc.)
XHT Extensible HyperText Markup Language File
XHTM Extensible HyperText Markup Language File
XHTML Extensible HyperText Markup Language File
XHTML Libxml HTML File
XI eXtended Instrument
XI ScreamTracker Instrument File
XI Fast Tracker 2 Instrument
XIA Chiasmus Encrypted File (Bundesamt für Sicherheit in der Informationstechnik)
XIB Interface Builder User Interface Resources (Apple Inc.)
XIF LonMark Device Interface File (LonMark International)
XIF [Removed by request] [Removed by request] (ScanSoft, Inc.)
XIF Xerox Image File
XIF eXtended Image File Format
XIF [Removed by request] [Removed by request] (ScanSoft, Inc.)
XIF Often a Fax Image (TIFF) File
XIF Wang Image File
XIM X11 Xim Toolkit Bitmap
XIN OmniMark Include File (Stilo)
XIP Xbox Dashboard (Microsoft Corporation)
XIP HP95 Execute-in-place Program
XIP Hotbar Image Compression Format (Skin) (Zango)
XISE Xilinx ISE ISE Project File (XILINX)
XIX IIS NNTP Subject Lists (Microsoft Corporation)
XJS WinExplorer Java Script
XJT Compressed GIMP Image with Properties of GIMP
XJTGZ Compressed GIMP Image with Properties of GIMP
XJTZ2 Compressed GIMP Image with Properties of GIMP
XKS IBM Softcopy Reader PDF Extended Bookshelf File (IBM)
XL XBLite Program File
XL Old Amiga Movie Format
XL Excel Spreadsheet (Microsoft Corporation)
XL$ Modem Bitware Fax Disk2 File
XLA Data Import aka Dimport Translation Table (DATAIR Employee Benefit Systems, Inc.)
XLA Xlib Archive
XLA Excel Add-in (Microsoft Corporation)
XLAM Excel Add-In (Microsoft Corporation)
XLAMENX egis Encrypted XLAM (Excel 2007) File (HiTRUST Inc.)
XLAT Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XLB Excel Worksheet (Microsoft Corporation)
XLC Excel Chart (Microsoft Corporation)
XLD Excel Dialog (Microsoft Corporation)
XLE Cooktop File
XLF XLIFF Document
XLF Crystal Xcelsius Visualization (Business Objects SA)
XLG Xnetech Engraving Logo File
XLG AutoCAD XREF Log (Autodesk, Inc.)
XLGC ExpressK Database File (Prosystech)
XLK Excel Backup (Microsoft Corporation)
XLL Excel Add-in (Microsoft Corporation)
XLM Excel Macro (Microsoft Corporation)
XLNK XML Link File (Tom Arn)
XLO Inventor Export Journal (Autodesk, Inc.)
XLR Works Spreadsheet or Chart (Microsoft Corporation)
XLS Works Spreadsheet (Microsoft Corporation)
XLS Excel Worksheet (Microsoft Corporation)
XLSB Excel Binary Workbook (Microsoft Corporation)
XLSBENX egis Encrypted XLSB (Excel 2007) File (HiTRUST Inc.)
XLSENX egis Encrypted Excel XLS File (HiTRUST Inc.)
XLSHTML Excel HTML Document (Microsoft Corporation)
XLSM Excel Macro-Enabled Workbook (Microsoft Corporation)
XLSMENX egis Encrypted XLSM (Excel 2007) File (HiTRUST Inc.)
XLSMHTML Excel Archived HTML Document (Microsoft Corporation)
XLSX Excel Microsoft Office Open XML Format Spreadsheet (Microsoft Corporation)
XLSXENX egis Encrypted XLSX (Excel 2007) File (HiTRUST Inc.)
XLSXENX egis Encrypted Excel Open XML XLSX File (HiTRUST Inc.)
XLT Procomm Plus Translation Table
XLT Lotus Translation Table (IBM)
XLT Excel Template (Microsoft Corporation)
XLTHTML Excel HTML Template (Microsoft Corporation)
XLTM Excel Macro-Enabled Template (Microsoft Corporation)
XLTMENX egis Encrypted XLTM (Excel 2007) File (HiTRUST Inc.)
XLTX Excel Template (Microsoft Corporation)
XLTXENX egis Encrypted XLTX (Excel 2007) File (HiTRUST Inc.)
XLV Excel VBA (Microsoft Corporation)
XLW Excel Workspace (Microsoft Corporation)
XLX XoloX Incomplete Download File
XLXML Excel XML Worksheet (Microsoft Corporation)
XM Fast Tracker 2 Extended Module
XM2 TextMap Ver. 2 Case Format File (LexisNexis)
XMAP File That Controls How XML/XSL Gets Served
XMAS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XMB X-Wing Mission Briefing File
XMC Expression Media Catalog (Microsoft Corporation)
XMCD Xmcd CD Information (freedb.org)
XMCD MathCAD XML-based Worksheet (Mathsoft Engineering & Education Inc.)
XMD GameJack Virtual CD or DVD Image (S.A.D. GmbH.)
XMD OmniMark Source Code (Stilo)
XMF Mobile XMF File Format
XMF Milnta APL Transfer Function
XMF eXtensible Data Model and Format (XDMF)
XMF Extensible Music File Format (MIDI Manufacturers Association Incorporated)
XMFG MediaForge Runtime Player Distribution Project (XMLAuthor, Inc.)
XMH XMap Handheld Street Atlas USA Map and Route File (Delorme)
XMI XML Metadata Interchange Format
XMI EverQuest File
XMI Winamp Extended MIDI File
XMI XMIT File Format (IBM)
XMI XMill Compressed XML (Dan Suciu, AT&T Labs-Research and Hartmut Liefke, University of Pennsylvania)
XMIT XMIT File Format (IBM)
XML Extensible Markup Language File
XMLBACKUP EnABLE Backup File (Energy Scitech Ltd.)
XMLS Microsoft Excel 2003 Excel XML File (Microsoft Corporation)
XMN Expression Media Notepad (Microsoft Corporation)
XMO Authorware Movie Driver (Adobe Systems Incorporated)
XMP Adobe Extensible Metadata Platform (Adobe Systems Incorporated)
XMP Graphic File
XMP XMap Project Data (Delorme)
XMP Spice Pspice Library File
XMPCF TextMap Portable Case Format (LexisNexis)
XMPSES Premiere Elements DVD Marker File (Adobe Systems Incorporated)
XMPTF TextMap Portable Transcript Format (LexisNexis)
XMS RapidCaption Script (PeopleSupport, Inc.)
XMS ViewCafT XML Markup Session
XMS AutoCAD External Message (Autodesk, Inc.)
XMS XMS-Tracker
XMT_TXT Parasolid CAD File
XMV Milnta APL Transfer Function
XMX AutoCAD External Message Compiled File (Autodesk, Inc.)
XMX Character Set File
XMXP Help & Manual Uncompressed XML Project (EC Software GmbH)
XMZ Fasttracker 2/Extended Module
XMZ MegaView XGL Movie
XMZ SofTeach Secure Exam File (ExamSoft Worldwide)
XNB XNA Game Studio XNA Framework Content Pipeline Binary File (Microsoft Corporation)
XNF Standard Network File Form
XNG FishXing Culvert Data File (Stream Systems Technology Center, USDA Forest Service)
XNG OM2 911 Xchange Version 6 Document
XNK Exchange Shortcut (Microsoft Corporation)
XNML NML Language Language Extension (NevoSoft)
XNT W32/Sober-AD
XNT Spice Pspice Library File
XOF RenderMorphics
XOI eZediaMX and eZedia Player Locked Presentation Document
XOM OmniMark Source Code (Stilo)
XOS Xaos Tools Bitmap Image
XOT Xnetech Job Output File
XOV Rapidform XOV 3D Inspection/Model File (INUS Technology, Inc)
XP System Utility File
XP3 TVP (Kirikiri) XPK3 Virtual File System (kikyou.info)
XPA SoniqSync Extended Playlist (SoniqCast, LLC)
XPA Xpandata DB Transfer Encrypted Compressed File
XPADDERCONTROLLER Xpadder Controller Layout (Xpadder Team)
XPB XPB! Basic Source Code (Tony D. Jones)
XPC ActionReplay Saved Code (Datel Design and Development Ltd.)
XPD Playstation Download Instruction (DRM) File (Sony Corporation of America)
XPF XaoS Position File (Jan Hubicka, Thomas Marsh, Zoltan Kovacs and Others)
XPF X-Protector Project (The Xprotector Team)
XPF Xemod Project File (Xprise Business Solutions BV)
XPI Mozilla/Firefox Browser Extension Archive (Mozilla)
XPIX Nonogram Puzzle
XPJ Micro Planner X-Pert Project Data File (Micro Planning International Inc.)
XPK Spice Pspice Library File
XPK XPK Player Compressed Audio (Data Becker)
XPK Xscript Package (Codec Games)
XPL X-Plane Plug-In (The House of X-Plane)
XPL Music File
XPL LCDStudio Configuration Playlist (LCDStudio.com)
XPL WinExplorer Simple Script
XPL Xset Plug-ins File
XPM DESQview Macro (Symantec Corporation)
XPM BMC Software Patrol UNIX Icon File
XPM X Pixmap Graphic
XPO X-port Version 1
XPO Omega Research ProSuite
XPO Expo Product Tours Project (InstallShield Software Corporation)
XPO Microsoft Dynamics AX Microsoft Dynamics AX (Microsoft Corporation)
XPP xCOMPOSER.pro Multimedia Data File
XPR Expression 3 Graphic File (Creature House Ltd.)
XPR exPresset CD Label (Pressit)
XPR XBMCTex/Xbox Media Center Graphic File (XboxMediaCenter Project)
XPS MonkeyJam Exposure Sheet (David Perry)
XPS XML Paper Specification (Microsoft Corporation)
XPS X-port Version 2
XPT SAS Transport (XPORT) Format
XPT Dungeons & Dragons Core Rules 2 (Wizards of the Coast, Inc.)
XPT eXact Packager Models (Giunti Interactive Labs S.r.l. (a company of Giunti Publising Group))
XPT XPCOM Type Library
XPTHEME Winstyles Theme (Stardock Corporation, Inc.)
XPTOC XDIME Player Table of Contents (Volantis Systems Ltd.)
XPW Accessible FormNet Fillable Form (Intercon Associates Inc.)
XPW Leading Market Technologies EXPO
XPX XML Format File
XPX RAFTS-XP Macro File (XP Software Inc.)
XPX Dungeons & Dragons Core Rules 2 with Expansion (Wizards of the Coast, Inc.)
XPY MarketBrowser
XPY xpy Settings File (Jan T. Sott)
XQL XML Query Language (XQL) (World Wide Web Consortium)
XQT SuperCalc Macro Sheet
XQT Waffle Executable File
XR Chaos Desktop External Reference File (Chaos systems AB)
XR Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XR1 Epic MegaGames Xargon File
XRC wxWidgets wxPython Resource File
XREF Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XREF AIX Cross Reference File
XRF TrialDirector Cross Reference File (inData Corporation)
XRF Cross Reference
XRF Crossreference File
XRG Xscript Game Registry (Codec Games)
XRL XML Résumé Library Résumé
XRL OSCAR Rules File
XRL PowerDesigner Report (Sybase, Inc.)
XRL Rapidform XOR/XOS 3D Scan Data & CAD File (INUS Technology, Inc)
XRM-MS Microsoft Security Certificate (Microsoft Corporation)
XRNS Renoise Music File (Multiple Individuals)
XRP Experior Practice Management Report (Experior Corporation)
XRP RationalPlan Project File (Stand By Soft)
XRS Realplayer Plug-in External Resources File (Real)
XRT Revolution EDX Spectrum Export File in Xraytor Format (4pi Analysis, Inc.)
XRW Architag XRay XML Editor
XRX Expression Encoder Media Profile Settings (Microsoft Corporation)
XS Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
xs Perl xsub File Produced by h2xs
XS Hummingbird Exceed File
XS3 XESS Worksheet (Applied Information Systems, Inc.)
XS4 XESS Worksheet (Applied Information Systems, Inc.)
XS5 XESS Worksheet (Applied Information Systems, Inc.)
XS8 SIMUL8
XSA XSA Raw Disk Image (XelaSoft)
XSB XACT XACT (Microsoft Corporation)
XSB Sokoban++ Level File
XSC Transcribe! Transcription Document (Seventh String Software)
XSC Xscript Script (Codec Games)
XSC XVI32 Script File (Christian Maas)
XSC XML Schema
XSD XML Schema
XSEND Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XSF Milnta APL Transfer Function
XSI Softimage XSI 3D Model (Avid Technology, Inc.)
XSL XML Stylesheet
XSL Steuer2001 File
XSL FileMaker Database Design Report Template
XSLT XSL Transform File
XSM LEXIS-NEXIS Tracker
XSN InfoPath Dynamic Form/Template (Microsoft Corporation)
XSN xyALGEBRA File
XSO Expresso Project File (Ultrapico)
XSP Cross Stitch Professional Design File (DP Software)
XSPF XSPF Playlist (Xiph.Org Foundation)
XSQL Oracle XSQL Servlet XSQL Template File (Oracle Corporation)
XSR GEOPAK XS-List Report (Bentley Systems, Incorporated)
XSS Cross Stitch Professional Design File (DP Software)
XSS Ability Office Spreadsheet (Ability Software)
XST X-Tract XML Script (DecisionSoft Limited)
XST Easy Cross Cross Stitch Design (DOS Version) (Fulford Software Solutions)
XSTEP XStep DWI Maker File
XSU Fortran Libf77 File
XSUM Clapack File
XSW Milnta APL Transfer Function
XSWRITER TechWriter for XML Schemas Document (Adivo Ltd.)
XT FastTracker Music Track
XT* Crosstalk Related File
XTB LocoScript External Translation Table (LocoScript Software)
XTC XTrkCAD Project
XTC XTrkCAD Project (with Remarks)
XTD XML Type Definition
XTEL Xtelplot File Format
XTG TreeGraph 2 TreeGraph 2 (BioInfWeb)
XTG QuarkXPress Tags File (Quark, Inc.)
XTI Blue Wave offline mail reader Blue Wave offline mail reader (Blue Wave Software)
XTM Xtremsplit Split Data File
XTM CmapTools Exported Topic Map (IHMC)
XTML XML4web Virtual HTML File (Altair Communications Corporation)
XTODVD ConvertXtoDVD Project File (VSO-Software)
XTP XTrkCAD Parameters
XTP XTrkCAD Demo (with Remarks)
XTP XTreeGold Overlay
XTP XTrkCAD Demo
XTP XTree Data File
XTR RealArcade Compressed Data File
XTS Babya Desktop Shell System Software Extension
XTS CSPro File
XTX xText Source File (Flambeaux Software)
XUF Milnta APL Transfer Function
XUI XBox / XBox UI Tool XBox / XBox UI Tool (Microsoft Corporation)
XUL XML User Interface Language (Mozilla)
XUM Excel CAPE-OPEN Unit Operation Excel Unit-operation Model (AmsterCHEM)
XUW Milnta APL Transfer Function
XV Khoros Visualization Image File
XVB WinExplorer VB Script
XVC Verge Compiled Game Code (VERGE Co Ltd)
XVF Xyngo Video Board Media File (Xyngo AG)
XVG GROMACS Output File
XVID XviD CODEC
XVM VMware Virtual Machine Console (VMware, Inc.)
XVO ratDVD Internal File (RatDVD - Canada)
XVP Xview Package File
XVS Xview Scene Package File
XVU BOClean Database File
XWB XACT XACT (Microsoft Corporation)
XWC Crosstalk for Windows Compiled Script
XWD X Windows Dump
XWD Crossdown Puzzle File (Crossdown)
XWF Yamaha XG Works File (Yamaha Corporation of America)
XWF Declan Software Word File (Declan Software)
XWI X-Wing Mission File
XWK Crosstalk Keyboard Mapping
XWP XMLwriter XML Editor Project File (Wattle Software)
XWP Crosstalk Session
XWP Xerox Writer Text File
XWP Crosstalk for Windows Phone book
XWS Crosstalk for Windows Script
XWS Xara Webstyle File (Xara)
XWV Reason Malström Synth Instrument Patch (Propellerhead Software)
XWZ Xset Wizards File
XWZ_1 Xteq X-Setup File
XX Arcedit Temporary File
XX Xxencoded File
XXA Brixx Planner Account Detail Chart (Brixx Solutions Ltd.)
XXD Brixx Planner Calendar File (Brixx Solutions Ltd.)
XXE Xxencoded File
XXG Brixx Planner Graph (Brixx Solutions Ltd.)
XXI GameSpy Arcade (IGN Entertainment, Inc.)
XXL Archive
XXN Dimenzo Text Editor Text Document (Dimenzo, Inc.)
XXP Brixx Planner Plan File (Brixx Solutions Ltd.)
XXR Brixx Planner Report File (Brixx Solutions Ltd.)
XXS Sorenson Squeeze Settings File (Sorenson Media, Inc.)
XXT Extension DLL
XXX Controlware VJ400 Digital CCTV Recording
XXX Paint Shop Photo Album Panorama (Corel Corporation)
XXX Compucon/Singer PSW Embroidery Design File
XXXX Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XXXXXX allTunes Partial Download (Mediaservices, Inc.)
XXY SPARC Executable Script File
XY XYWrite Text File
XY Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
XY3 XYWrite Text File
XY4 XYWrite IV Document
XY4V XYWrite IV document
XYD XYPad 2D CAD File (Coopware)
XYP XYWrite III Plus Document
XYS XYplorer Script (Donald Lessau)
XYW XYWrite Windows 4.0 Document
XYZ XYZZLY Plug-In for RealPlayer
XYZ RPG Maker Graphic Format (Enterbrain, Inc.)
XYZ XMol XYZ
XYZ MDL Molfile Co-ordinate Animation Format (MDL Information Systems, Inc.)
XYZ Förderdiagnose Data File (Bettinger Software)
XYZ Graph Coordinates
XYZI 3rdTech Scanner File
XYZRGB XYZ RGB Graphic (XYZ RGB Inc.)
XZ XZ Utils Compressed Archive
XZP XZP Container Format
X_B Parasolid CAD File
X_T Parasolid CAD File (UGS Corp.)

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