Another thin arrow GIMP Python plug-in called 'ArrowsCreator'.
It's characteristics are:
-produces many different types of straight arrows
-produces one type of 'path' arrow
-facilitates combination of multiple arrows
-interactive with GIMP
-developed on GIMP 2.6 (work on 2.8 except no repeat gradient in shaft and GIMP don't control brush size).
GIMP Book is a script for managing multiple pages in the GIMP, it's great for creating comic books, illustrated books, sketch books or similar. It opens a separete window with thumbnails of all your pages, where you can add, delete, sort and rename them. Once you're done you can export your book to various formats, for web or print.
The Polar Monitor Bitmap is a simple text-based 1-bit image file format. It is used for uploading logos to Polar watches (http://www.polar.fi/) using e.g. the Polar UpLink Tool or the Polar ProTrainer software.
Build and install:
$ gimptool-2.0 --install file-pmb.c