gimp-reflection extends lower section of an image as a reflection of the original image.
Download it here.
For those interested, this plugin still exists and can be installed for GIMP fine. See:
I'm getting a permissions error trying to download this?
Looks like this project doesn't exist anymore on code.google.com.
Unless otherwise noted, the rights for the individual plugins are with their respective authors. Logo image by Jakub Steiner.
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