.FME File Extension
What is an FME file?
Spatial data mapping file created by FME Workbench, a visual data translation program included with FME Desktop; stored in plain text and contains "functions" and "factories" which manipulate spatial data between different formats.
The FME Workbench application natively saves projects as .FMW files. However, you can choose to save the file in the FME text format by selecting File → Save As... and choosing "FME Mapping File" from the drop down list.
NOTE: FME files can be run through the FME Universal Translator, which is also included with FME Desktop.