| File Extension: | GRK |
| File Type Description: | Gradekeeper Class Gradebook File |
| File Type Developer: | Daniel Ethier |
| Primary Associated Software: | Gradekeeper |
| Primary Software Developer: | Daniel Ethier |
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Daniel Ethier developed the Gradekeeper Class Gradebook File file type when the Gradekeeper was initially released. Website visitor analysis indicates that GRK files are commonly found on Windows 10 user machines, and are most popular in United States. A high percentage of these users browse the web using Google Chrome.
 | Gradekeeper by Daniel Ethier |
 | Rapidform Explorer (Geomagic Verify Viewer) by Rapidform, Inc. |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .GRR | Daniel Ethier | Data Files | Gradekeeper Class Roster Data |
| .XLW | Microsoft Corporation | Data Files | Microsoft Excel Workspace |
| .XPT | Mozilla | Plugin Files | Mozilla Firefox Component |
| .XYZ | SourceForge | Data Files | Molecule Specification File |
| .NED | OpenSim Ltd | Developer Files | OMNeT++ Network Description File |
| .CPO | Corel Corporation | Data Files | Corel Print House Data |
| .GNA | Microsoft Corporation | Data Files | Genigraphics Graphics Link Presentation File |
| .73D | Texas Instruments, Inc. | Data Files | TI Connect Data |
| .ABU | ASUS | Backup Files | Asus App Backup File |
| .PPSX | Microsoft Corporation | Data Files | PowerPoint Open XML Slide Show |
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