GIMP Plugin Registry

It reduces global contrast in images while increasing local contrast and shadow/highlight detail. Use this to make your images "pop."

Creates an outer border of the image with reduced brightness and 2 inner colours.

Uses one colour for the highlights and another for the shadows.

This script allows you to extract and apply saturation to a layer. When you extract, it adds a new layer with the saturation values (in gray colors). You can then use curves, brightness/contrast or the dodge tool to correct saturation. When you are okay with the adjustements you can put back the saturation by applying it.

It installs itself in < script-fu >/Saturation.

Comments inside the script are in french.

This Script Generates a SpaceScape (StarScape)   a deep space picture with stars and space dust clouds.
You can determine the aspects of the space dust clouds, the color, the image size and the amount of detail.  read more »

Implement several different black and white conversions including color filters

More information:

http://epaperpress.com/psphoto/
http://www.thelightsrightstudio.com

Simulate several Duo- and Tritones (like sepia)

Tutorial: http://www.gimp.org/tutorials/Sepia_Toning/

Change the color saturation of your image (implementation of a 'digital velvia')

Creates two borders around the outside of your image with a shadow layer in between.