GIMP 2.8 Python Plugin.
This plugin allows you to duplicate layer, layer with mask, or layer group from one image to another.
1. Extract "duplicate-to-another-image.py" from .zip archive to the ".../.gimp-2.x/plug-ins/" directory.
2. Make sure that the extracted file is executable.
3. If you are already running GIMP, close and reopen it.