GIMP Plugin Registry

I just notice that MathMap one of the better Gimp Plugin is not listed here.
To present it i just quote its developer Mark Probst
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MathMap is an image processing application that works on several levels:

* Without any prerequisite knowledge about image processing, one can use any of the more than one hundred filters that come bundled with MathMap.  read more »

This plug-in enables you to use the vast number of existing filters made for Photoshop's Filter Factory as well as create new effects without having to go through the process of learning how to write plug-ins for The Gimp first.
Originally written by Jens Restemeier for Gimp 1.x back in 1997, this plug-in has now been updated for use with Gimp 2.x.
Project homepage is at http://gimpuserfilter.sf.net/
You can find lots of free FF filters that can be imported into User Filter at http://www.photoshop-filters.com/  read more »

The Script generates a glowing image (RGBA). Use for create an icon with glow effect (selected) like Amiga desktop. Script support combine glowing methods for any applications. Glow options:

* Glow Color
* Glow Intensity (0..10)
* Brightness (0..120)
* Gaussian Blur Intensity (1..100)
* Post-Blur: Pixelize
* Post-Blur: Noisify
* Image decrease scaling (x24..x2)

Ready for Gimp 2.4.3!

 read more »

RAWTex is a save plugin for GIMP 2.2.x, 2.3.x & 2.4.x allowing to create raw textures for the PC, PSP, NDS, PS2 or any other architecture handling chunky or compressed dxtc formats.

It can save raw RGBA (5650, 5551, 4444 or 8888) & indexed (T4, T8) textures (with 5650, 5551, 4444 or 8888 palette modes support) as well as DXTC (DXT1, DXT3, DXT5) compresssed ones, it supports the PSP textures swizzle mode and can generate mipmaps, it also have a color key feature to handle transparency and can convert grayscale pictures into alpha channel only textures.