| ex | Euphoria Source Code |
| ex2 | ParaView EX2 Mesh Data |
| ex4 | MQL4 Compiled Modules |
| ex5 | MetaTrader 5 Program |
| exml | Tizen Effect Model |
| exob | WeintekHMI EasyBuilder Pro Compiled Project |
| exsd | Eclipse Extension Point Schema |
| ext | Visual Studio .NET DB Project Extended Properties |
| exu | Euphoria Source Code |
| exv | Adobe Extension Script |
| exw | Euphoria Source Code |
| ey | Engine Yard Project Configuration |
| ezg | EZGraphs Source Code |
| f | Forth Source Code |
| f | Fortran Source Code |
| f4 | Fortran IV Source Code |
| f77 | Fortran Source Code |
| f90 | Fortran Source Code |
| facefx | FaceFX Actor File |
| faces | FacesServlet Page |
| fal | Falcon Script |
| fam | Falcon Compiled Module |
| fasl | Lisp Source Code |
| fb | Gforth Blocks File |
| fbap | FinalBuilder Action Package |
| fbl5 | FinalBuilder Project Log |
| fbl6 | FinalBuilder Project Log |
| fbp | wxFormBuilder Project |
| fbpinf | FinalBuilder Project Info |
| fbv | FinalBuilder Persistent Variables File |
| fcb | FAAST Builder File |
| fce | ForeUI Custom Element |
| fcl | ForeUI Custom Library |
| fcs | CC5X C Compiler Function Call Structure |
| fd | Fortran Declaration File |
