| xef | X-Genics eManager Form Data |
| xej | Microsoft Expression Encoder Job |
| xel | Microsoft Expression Encoder Live Encoding |
| xem | Sybase PowerDesigner Extension File |
| xeq | Sage MAS 90 XEQ Data |
| xes | X-Genics eManager Skin Data |
| xet | X-Genics eManager Process Definition |
| xev | X-Genics eManager Auto-Update File |
| xez | X-Genics eManager Template Package |
| xf | Scanalyze Transform Data |
| xfb | LonWorks Binary Device Interface File |
| xfc | Origin Compiled X-Function File |
| xff | NiceLabel Form Data |
| xfi | xICE Desktop Encrypted Data |
| xfo | LonWorks Optimized Device Interface File |
| xfr | TIBCO iProcess Process Definition |
| xft | Adobe Form Designer XML Form Template |
| xfz | Declan Flashcards Words Data |
| xg0 | Corel Paradox Index File |
| xg1 | Corel Paradox Index File |
| xgmml | XGMML Graph |
| xgp | Xfire Game Patcher Data |
| xhb | HomeBank Data File |
| xhp | OpenOffice.org XML Help |
| xic | DIF Freedom Data |
| xid | Visual Localize XML Import Definition |
| xif | LonWorks Device Interface File |
| ximp | XOS Digital Export Package |
| xip | Photo Mechanic Metadata File |
| xir | XML Intermediate Representation Data |
