| rf1 | Retirement Forecast Data |
| rf5 | Tektronix RFXpress RF5 Record Data |
| rfa | Autodesk Revit Family File |
| rfb | RoboForm Bookmark File |
| rfc | RoboForm Contact File |
| rfd | RockFlow Simulation Data |
| rfe | RockFlow Log |
| rff | Roproc Format File Data |
| rfg | iNTEGRATOR Data |
| rfh | iNTEGRATOR Householding Data |
| rfi | SPEFO Filtered Data |
| rfl | ANSYS RFL Results Data |
| rfl | RISAFloor Analysis Data |
| rfl8 | Avantes Avasoft v8 Reflectance Mode Data |
| rflw | Adobe Edge Reflow Data File |
| rfn | RoboForm Safenote File |
| rfo | RoboForm Option File |
| rfo | RockFlow Results Data |
| rfp | RoboForm PassCard File |
| rfq | RoboForm SearchCard File |
| rfr | Adobe Photoshop Frame Filter |
| rfs | RealFlow Script |
| rfs | Samsung RFS Image |
| rft | Autodesk Revit Family Template |
| rft | RoboForm Identity File |
| rftmap | IBM Rational Functional Tester Object Map |
| rfv | Restricted Focus Viewer Input Data |
| rfx | RoboForm Blocking Passcards File |
| rgd | Rosegarden Device Definition |
| rgi | RealArcade Game Installer |
