.FM file format. (There's a lot of these kinds of threads lately.)

[Crett]

T'was a normal day ripping KH2 models.
When I came across some stupid format I did not recognize.
So I thought "Noesis might be able to read it.."
Unfortunately, it fail'd to read it.
And to this day I have no idea what the heck an .fm file is.
What's an .fm file?

[GrimmJeel]

This is a great extractor tool, all you have to do is select a script at the bootom right corner, this may have a .fm script

Extractor tool

[Shadowth117]

No idea about it. It might help to know the game though. If its a large file, it may be a file archive like Grimjeel suggested, but if you're seeing a lot of them than it could be the model format for that game.

[Crett]

I don't think it's a model format, but it might be.
Because all of the models are in mdl0/mdlx/map format.
Maybe it's some sort of script file, seeing as they're named after each of the models..