| xpd | PlayStation Network Downloader Data |
| xpf | DB/TextWorks Exported Form Definitions |
| xpf | IMVU Morph Data |
| xpf | XaoS Position Data |
| xpf | Xemod Project Data |
| xpg | Autoplay Media Studio Exported Page |
| xpgt | Adobe InDesign XML Page Template File |
| xpk | DB/TextWorks Exported Record Skeleton Definitions |
| xpk | NMRView Peak List |
| xpk | PSpice Library |
| xpk | PSpice Library Format Data |
| xpl | Kazaa Music Data |
| xpl | LcdStudio Playlist |
| xpll | Pull-Planner Data |
| xpm | DESQview Macro Data |
| xpo | Microsoft Dynamics AX Export |
| xpo | X-port v1 Data |
| xport | SAS XPORT Engine Data |
| xpp | Microsoft SQL Server Replication Data |
| xpq | DB/TextWorks Exported Query Screen Definitions |
| xpr | Pro/ENGINEER Part Data |
| xpr | Pro/ENGINEER XPR File |
| xps | DB/TextWorks Exported Set Definitions |
| xps | MonkeyJam Exposure Sheet |
| xpse | KNFB Reader Data |
| xpt | EES Export |
| xpt | eXact Packager Model Data |
| xpt | SAS XPORT Engine Data |
| xptheme | Theme Manager Theme Package |
| xptin | XPSWMM Hydrology Data |
