GIMP Plugin Registry

Focus Blur plug-in is blurring effect, a kind of called DoF. This software makes a out of focus with luminosity and depth, like a sight or lenses. It can be used with epth map, depth fakes and shine effect. Also it can work as simple and applicable blur.
http://sudakyo.hp.infoseek.co.jp/gimp/fblur/focusblur_e.html

Puts 2 borders around the image. The outside border is a Gausian blur of the image itself, the inner border is a colour.

This script has 4 options:
1. Border colour, pick the colour of the inner border.
2. Border size, the width of the colour border.
3. Blur amount, the amount of blur applied to the border.
4. Blur border size, the width of the blur border

Before:

After:  read more »

GREYCstoration is a noise reduction plug-in.
It allows to remove noise (grain) or small artefacts (JPEG blocks effect) from color images. It is based on anisotropic diffusion partial differential equations.

 read more »

• Algorithm code done by David Tschumperlé.
• Plug-in code done by Grzegorz Szwoch.

Applies Gaussian blurs using different radii for different parts of the image, according to a map.