GIMP Plugin Registry

Easily map colours from a source colour to a target colour. Very effective for matching skin tones across images or between people.

Relatively quick (but not earth shattering). It doesn't work with grayscale or indexed images. Has preview, works with selections and layers, etc. Very, easy to use, and quite useful for portraits or recolouring graphics.

A demonstration: Lenna's face is mapped to the colour of the feather on her hat. This was done by selecting a colour from her face, then selecting a colour from the feather.  read more »

Version 2.4

This Script-Fu creates a completely new image having an RGB and/or HSV gradient in two directions - both horizontally and vertically - based on the colors you specify for the four corners. The layer name includes the parameters to support reproducibility.

Superceded as of 4/26/09 by 2-Dimensional Gradient.

Version 2.4: layer name color parameters shown in hex to facilitate copying into color widget.  read more »

The G'MIC plug-in for GIMP defines a set of various filters, including artistic filters, image denoising and enhancement, 3D renderers, etc..  read more »