A simple plug-in to do fourier transform on you image. The major advantage of this plugin is to be able to work with the transformed image inside GIMP. You can so draw or apply filters in fourier space, and get the modified image with an inverse FFT.
Once installed, this plugin will add an 'Iterative Save' entry in your GIMP menu, under File -> Save. Using this with an image which has been previously saved as an XCF will now save the image with an added numeric suffix. The first time this feature is invoked, it will save your image as yourfile_0000.xcf; subsequent calls will continue to save the image with an increased numeric suffix (i.e. image_0001.xcf, image_0002.xcf, etc).
Script to randomly mix cells of a selection. The bounding box of the current selection will be used automatically to eliminate non-rectangular and feathered selection. After specifying the count of columns and rows in the selected region the width and height of the selection will be reduced if necessary (thus ensured the divisibility of the selection). The script will then shuffle the cells inside the selection and return the mixed image on a new layer or in place of the original layer.