Slinky is a python plugin that generates a sine wave following an existing path. The sine wave can be spread between two paths to create a coil perspective around another object.
Slinky is available here: http://gimp-slinky.sourceforge.net/
To graph the trigonometric function sin(θ) or cos(θ) on the image
Author web site: http://xoomer.alice.it/lwcon/gimp/
Unless otherwise noted, the rights for the individual plugins are with their respective authors. Logo image by Jakub Steiner.