| frc | Goldmine Report Writer Report |
| frd | Autodesk Simulation Mechanical DDAM Frequency Data |
| frd | Frequency Response Data |
| frd | Mandelbrot Explorer Fractal Definition File |
| frd | Microsoft FRx DrillDown Viewer Enhanced XML |
| frd | Room EQ Wizard Frequency Response Data |
| frdat | Abbyy FineReader Data |
| frec | Fiasco Database Frequencies File |
| fred | Flight Recorder Electronic Documentation Data |
| freepp | Free PDF Perfect Data |
| freq | SAM Frequency Model Data |
| fres | Autodesk Inventor Stress Analysis Results Data |
| freshcontact | Navigon Mobile Navigator Contact Data |
| frf | Abbyy FineReader Intenal Page Data |
| frf | Ginga X-Ray First Reduction Data |
| fri | Fractal Explorer IFS Spot |
| fri | Mozilla Firefox Bookmark Backup Data |
| frk | FORMIK Data |
| frm | AccountEdge Form Data |
| frm | Corel Painter Frame Stack Data |
| frm | EZ-Forms Master Form |
| frm | FractInt Fractal Formula Data |
| frm | MySQL Server Database Format Data |
| frm | PTC Creo Drawing Format Data |
| frmx | AccountRight Custom Form Data |
| fro | dBASE IV Compiled Report |
| fro | Fractal Explorer Orbita Spot |
| froi | First Response of Injury Data |
| frp | Fractal Explorer Palette |
| frp | JetForm FormFlow 2 Form Data |
