color

GIMP Beautify plug-ins is a set of GIMP plug-ins for quickly and easily beautify photos.

This is one if its screen-shot:

You can download the plug-in at GIMP Beautify Home Site.

Please read the GIMP Beautify README before install and using it.

Color Grading plug-in, creates a cine image look based on user input. For a
contemporary image look, use complimentary colors in shadows and
highlights. It is also preferable to be used on a somewhat neutral image
(ie pre white balanced) for best control of the final result. If it's
not a raw image balance it before with Color Balance 2 [ http://www.registry.gimp.org/node/24589 ].

See samples:
Original:

I created a new version ot the layer-combine-with-all-layers script.

This is a complete new script.
Although the menu looks nearly similar, it is as different as the complete script is.
The discription of the function is more logical and the actions give a logic output.

Remember to remove the old layer-combine-with-all-layers.scm from your scripts folder if you have already downloaded it.

The script works for GIMP 2.7+ and is tested in windows 7.

Texturewerke is texture creation tool for GIMP.

It has two operating modes - color adjustment and highpass filter. More information can be found at Khayyam development page

Color adjustment

The plugin selectively blurs the color information (both hue and saturation) in image. There are two basic scenarios / reasons to use this: When saturating poorly saturated images (to prevent artifacts in color) and cartoonizing images. The plugin blurs selectively, and can even "sharpen" transitions between two colors.

The plugin have thee basic outputs - blur the color on place/image, cartoon mode and creation of lines.

This plugin creates fancy/colorfull/surrealistic images from photos.

Visit http://code.google.com/p/rainbow-tonemapping/wiki/Introduction for a bit more theory and examples

This plugin changes the color temperature of an image via shifting it in the YUV color space:
http://en.wikipedia.org/wiki/YUV

Compile and install it with:
$ CC="g++ -O2" gimptool-2.0 --install elsamuko-temperature.c

Menu entry is Colors -> Color temperature.