| esav | ANSYS Element Saved Data |
| escn | Godot Engine Exported Scene Data |
| esk | ESock Module Information |
| esl | Microsoft Visual FoxPro Support Library |
| essl | OpenGL ES Shader Language Data |
| esv | Uniface Entity Service Data |
| eto | Visual Studio Enterprise Template Object |
| eu | Euphoria Include File |
| ev3b | Lego Mindstorms EV3 Block File |
| ev3m | Lego Mindstorms EV3 for iPad Program |
| ew | Euphoria Include File |
| ewd | IAR System Debugger Data |
| ewo | SIMATIC WinCC External Widget Object |
| ewu | Embedded Wizard Unit |
| eww | IAR System Workspace Data |
| ex | Euphoria Source Code |
| ex2 | ParaView EX2 Mesh Data |
| ex4 | MQL4 Compiled Modules |
| ex5 | MetaTrader 5 Program |
| exe_ | Emu8086 Assembly Source Code |
| 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 |
| eze | ErZorScript Source Code |
| ezg | EZGraphs Source Code |
| f | Forth Source Code |
| f | Fortran Source Code |
| f | GCC Flags Data |
| f | Win32Forth Source Code |
| f4 | Fortran IV Source Code |
