This seems to be the standard editor for mdl files.
It is also abandonware.
Mirrored from https://quaketastic.com/files/qME_3.1.2.zip because that appears to be the only place it exists online and it was difficult to find.
It is also abandonware.
Mirrored from https://quaketastic.com/files/qME_3.1.2.zip because that appears to be the only place it exists online and it was difficult to find.