You will find here a collection of Gimp plugins that I have written for my own use, or for my own amusement.
The scripts can be downloaded here: https://sourceforge.net/projects/gimp-tools/files/scripts/
Some sample images can be found here: https://sourceforge.net/projects/gimp-tools/files/samples/. Layers, paths, and saved selections usually have a fairly descriptive name, so that the whole process is fairly easy to understand.
The older scripts are documented in the pages linked above.
The more recent scripts (those with an "ofn-" prefix) are delivered as a ZIP package that also contains the documentation (often in a "doc" subdirectory)
I like to keep my scripts simple and focused, so most scripts here only have simple results that you can further tweak and refine to achieve your own designs.
Support for these scripts is available on Gimp-Forum.net.