| xfr | TIBCO iProcess Process Definition |
| Xfrog Vegetation Graphics Data |
| xft | Adobe Form Designer XML Form Template |
| xfz | Declan Flashcards Words Data |
| xg0 | Corel Paradox Index File |
| xg1 | Corel Paradox Index File |
| xg2 | Corel Paradox Index File |
| xg3 | Corel Paradox Index File |
| xg4 | Corel Paradox Index File |
| xg5 | Corel Paradox Index File |
| xg6 | Corel Paradox Index File |
| xg7 | Corel Paradox Index File |
| xg8 | Corel Paradox Index File |
| xg9 | Corel Paradox Index File |
| xgd | Xbox 360 Game Disc Layout Data |
| xglc | EASE SpeakerLab GLL Configuration Data |
| xgmml | XGMML Graph |
| xgo | LogMate Data |
| xgp | Xfire Game Patcher Data |
| xgpa | SC-NomadLAB Data |
| xgr | XenoView Graph Data |
| xgt | XSENSOR Software Group Template Data |
| xhb | HomeBank Data File |
| xhd | HappyFish Data |
| xhessian | Insight II Hessian Data |
| xhf | NxOgre HeightField Data |
| xhn | EASE 4.0 ASCII Speaker Data |
| xhp | OpenOffice.org XML Help |
| xht | Sunnysoft InterWrite XHT Data |
| xic | DIF Freedom Data |
| xid | Visual Localize XML Import Definition |
| xif | LonMark Device Interface Data |
| LonWorks Device Interface File |
| ximp | XOS Digital Export Package |
| xip | HP 95LX Execute-in-Place Program |
| Photo Mechanic Metadata File |
| Xbox Dashboard Data |
| xir | XML Intermediate Representation Data |
| xit | SpatialAnalyzer Data |
| xit64 | SpatialAnalyzer Data |
| xix | Microsoft IIS NNTP Subject Lists |
| xiz | Ximinez Data |
| xjb-drive-id | Xtreamer Pro Drive Data |
| xjf | OmniPage BatchManager Job |
| xjsw | Tarsia Puzzle Data |
| xkb | X Keyboard Extension Data |
| xkm | X Keyboard Compiled Keymap Data |
| xkp | X-Keys Pro Data |
| xkt | Keysight Calibration Kit Data |
| xl2 | XL2 Analyzer Data |
| xl2r | XL2 Analyzer Data |
| xla5 | Microsoft Excel 5 for Mac Add-in |
| xlamenx | Egis Encrypted Excel XLAM Document |
| xlb | OpenOffice.org Module Information Data |
| xlb4 | Microsoft Excel 4 for Mac Toolbars Data |
| xlb5 | Microsoft Excel 5 for Mac Toolbars Data |
| xlb8 | Microsoft Excel 98 for Mac Toolbar Setup |
| xlbn | Microsoft Excel for Mac Toolbar Setup |
| xlc | OpenOffice.org Library Container Index |
| xldb | XLerator Database |
| xle | Levelogger Software XML Data |
| XML Cooktop File |
| xlg | Autodesk AutoCAD XREF Log File |
| xlgc | Prosystech ExpressK Database |
| xli | 3D Studio Max IGES Input Log |
| Siemens NX Log Data |
| xlkf | ABB RobotStudio License Key |
| xlm3 | Microsoft Excel 3 for Mac Macro Data |
| xln | Excellon Drill File |
| xlo | 3D Studio Max IGES Output Log |
| Autodesk Inventor Export Journal |
| xlog | WeChat Log Data |
| XLOG XML Log |
| xlp | SAP BO Xcelsius Add-On Package Project |
| xlsbenx | Egis Encrypted Excel XLSB Document |
| xlsmenx | Egis Encrypted Excel XLSM Document |
| xlsxenx | Egis Encrypted Excel XLSX Document |
| xltbcd | XL Toolbox Chart Design Data |
| xltbsession | XL Toolbox Session Data |
| xltmenx | Egis Encrypted XLTM Document |
