File Extension X - Stardent AVS X Image , etc
File Extension X01 - Paradox Secondary Index , etc
File Extension X02 - Paradox Secondary Index , etc
File Extension X03 - Paradox Secondary Index , etc
File Extension X04 - Paradox Secondary Index , etc
File Extension X05 - Paradox Secondary Index , etc
File Extension X06 - Paradox Secondary Index , etc
File Extension X07 - Paradox Secondary Index , etc
File Extension X08 - Paradox Secondary Index , etc
File Extension X09 - Paradox Secondary Index , etc
File Extension X1 - X1 Desktop Search Saved Search File (X1 Technologies, Inc.), etc
File Extension X10 - X Window Dump Bitmap , etc
File Extension X11 - X Windows System Window Dump Bitmap , etc
File Extension X13 - Hooligans , etc
File Extension X16 - Macromedia Program Extension , etc
File Extension X28 - Unknown Apple II File (found on Golden Orchard Apple II CD Rom) , etc
File Extension X32 - Macromedia Program Extension (Macromedia), etc
File Extension X3D - X3D File (Web3D Consortium), etc
File Extension X3DB - X3D Binary Format File (Web3D Consortium), etc
File Extension X3DBZ - X3D GZipped Binary Format File (Web3D Consortium), etc
File Extension X3DV - X3D Classic VRML File (Web3D Consortium), etc
File Extension X3DVZ - X3D GZipped Classic VRML File (Web3D Consortium), etc
File Extension X3F - Sigma Camera RAW Picture File (Sigma), etc
File Extension X4M - TeamLinks Mail File Data , etc
File Extension X5 - Rockwell Software Logix 5 File , etc
File Extension X64 - C64 Emulator Disk Image , etc
File Extension X83 - GAEB DA2000 XML and XML File (Bundesamt für Bauwesen und Raumordnung), etc
File Extension XA - Gear CD Suite File , etc
File Extension XA2 - Exam Editor Question Groups (Nice Productions), etc
File Extension XAB - Mail Address Book (Microsoft Corporation), etc
File Extension XACT - XactScript File (XactCommerce), etc
File Extension XAD - eXotic AdLib Format , etc
File Extension XADML - XML-based Application Description Information , etc
File Extension XAML - Windows Presentation Foundation Object Model XML-based Markup Language (Microsoft Corporation), etc
File Extension XAN - XANIA Browser , etc
File Extension XAP - Silverlight Application Package (Microsoft Corporation), etc
File Extension XAR - eXtensible ARchiver Archive , etc
File Extension XARC - The Longest Journey Sound File (Funcom), etc
File Extension XAS - Playstation Video (Sony Corporation of America), etc
File Extension XBA - Timespace X200/K200 Digital Video Recorder Video File (Timespace Technology Ltd.), etc
File Extension XBE - Xbox Executable (Microsoft Corporation), etc
File Extension XBEL - XML Bookmark Exchange Language (XBEL) File (SIG for XML Processing in Python), etc
File Extension XBF - Emperor Battle for Dune , etc
File Extension XBIN - RegSupreme License File (Macecraft Software), etc
File Extension XBK - SMART Board Slide Collection (SMART Technologies Inc.), etc
File Extension XBL - Extensible Binding Language , etc
File Extension XBM - X Bitmap Graphic , etc
File Extension XBP - XBWML X-Bite.co.uk Markup Language (X-Bite.co.uk), etc
File Extension XBS - ETAK MapBase , etc
File Extension XBW - Crossword , etc
File Extension XBX - XBox Image File (Microsoft Corporation), etc
File Extension XB~ - IC File , etc
File Extension XC - X Server Constant Screen Image Bitmap , etc
File Extension XC2 - HPXView DACCS Configuration (Haliplex Communication Systems), etc
File Extension XCD - WarpIN CID (Configuration, Installation, Distribution) File , etc
File Extension XCDATA - Xcode Core Data-based Data Model (Apple Inc.), etc
File Extension XCF - GIMP Image File (The GIMP Team), etc
File Extension XCI - Acrobat Font Mapping File (Adobe Systems Incorporated), etc
File Extension XCK - Extended Crack File , etc
File Extension XCL - Xtree for Win Script , etc
File Extension XCM - CmapTools Exported Concept Map (IHMC), etc
File Extension XCMD - Unknown Apple II File (found on Golden Orchard Apple II CD Rom) , etc
File Extension XCMDS - Unknown Apple II File (found on Golden Orchard Apple II CD Rom) , etc
File Extension XCN - HPXView DACCS Configuration (Haliplex Communication Systems), etc
File Extension XCP - Xbox Compressed Package (Microsoft Corporation), etc
File Extension XCR - Warlords Battlecry , etc
File Extension XCS - BuzzLetter Encrypted Stationery Template (StationeryCentral.com, Inc.), etc
File Extension XCT - XVI32 Conversion File (Christian Maas), etc
File Extension XCU - OpenOffice.org Extension Control File (OpenOffice.org Community), etc
File Extension XCZ - BuzzLetter Zipped Collection of Encrypted Stationery Templates (StationeryCentral.com, Inc.), etc
File Extension XD - CCS-lib.2 Examples Motif-CC File , etc
File Extension XDB - Norton AntiVirus Update File (Symantec), etc
File Extension XDC - Acrobat Printer Description (Adobe Systems Incorporated), etc
File Extension XDD - xfit XDD Format Data File , etc
File Extension XDE - Tgif-3.0 File , etc
File Extension XDELTA - Xdelta Binary Differential File , etc
File Extension XDF - Extended Disk Format Image , etc
File Extension XDIM - Multi-Channel Server (MCS) Markup Editor XDIME Document (Volantis Systems Ltd.), etc
File Extension XDK - XML Development Kit Project (Republicorp Virtual Media), etc
File Extension XDO - Oracle BI Publisher Resource Tracking File (Oracle), etc
File Extension XDP - UNIX File , etc
File Extension XDQ - Harvest Log File (Hydro-Logic Ltd, Isodaq Division), etc
File Extension XDR - BizTalk XML-Data Reduced Schema (Microsoft Corporation), etc
File Extension XDRUID - XDIME Player Skin (Volantis Systems Ltd.), etc
File Extension XDR_TO - Insight II Binary Torsion File (Accelrys Software Inc.), etc
File Extension XDS - XDS X-ray Detector Software , etc
File Extension XDSL - D-Link Router UK Firmware Update File (D-Link Systems, Inc.), etc
File Extension XDT - Xscript Data Packet (Codec Games), etc
File Extension XDW - Milnta APL Transfer Function , etc
File Extension XEA - Cryptomax Encrypted Archive (Cryptomax.net), etc
File Extension XEB - Apabi eBook , etc
File Extension XEC - Afaria (XcelleNet), etc
File Extension XEE - Expression Encoder Preset File (Microsoft Corporation), etc
File Extension XEF - eManager Form Data (X-Genics Ltd.), etc
File Extension XEJ - Expression Encoder Job File (Microsoft Corporation), etc
File Extension XEL - Expression Encoder Log File (Microsoft Corporation), etc
File Extension XEM - eManager Metering Unit Credits for File Use (XGenics Ltd.), etc
File Extension XEP - eManager File Packing Definition (XGenics Ltd.), etc
File Extension XES - eManager XML UI Definition for Skins (XGenics Ltd.), etc
File Extension XET - eManager XML Definition of eManager Process (XGenics Ltd.), etc