1)Photo edit
Edit Photography is considered as one of the Gimp main use,
leaving out other more specialistic script& plugin i will select

Liquid Resize,
Resynthesizer(+ related scripts) ,
Wavelet denoise
Refocus
Exif browser,

the first 3 are also adapt to edit also other type of images

2) file format plugin
ora
apng ?(apng plugin is a bit tricky to use don't integrate well in the save dialogs)
PDF + EPS ??
( require ghostscript and a additional path to be set )
jpg2000
Swf
(if can be made more friendly ,as now don't accept most of the Windows path
more is not integrated in the gimp save dialog require its own menu entry and save dialog)

for 2 ora and jpg2000 should work out of the box the other may require some fiddling

I use a lot of palettes and I have bunch that I downloaded but it seems like they're never the colors I want so 99% of the time I make my own palettes. I guess this doesn't really answer your question but the palettes that come with gimp are dopey and i end up deleting most of them. If it had palettes like these: http://browse.deviantart.com/?qh=&secti ... s#/d1d5mch it would be much more useful. I also use the ones made by 'Marmite Mamie' also on DA, they're much more useful than flags of countries I don't care about.

Layer effects. http://registry.gimp.org/node/186
The scheme script. (Python is trouble. Might have been fixed by now, but my version doesn't let you use undo in GIMP any more after you've used this python script.)

It's the first script that people new to gimp install. And the script that should come with GIMP by default if you ask me.

Next G'MIC.

Arrow brushes and other shaped bruses that can replace shapes that PS and PSP have. Here are some arrow brushes, but the pack is sloppy http://browse.deviantart.com/?qh=&secti ... p#/d2kbblg

All the patterns that come with OpenOffice. If that's allowed.

Are the same then in LibreOffice ?

Robs ShellOut script hands down probably one of my most important filters.

Rod in all the apps listed in the RobA-shell script topic there is something that may run PS filter and is even Open Source ?

Yes XNView is free and runs PS filters instantly.Guess you would need to dl it too.
Of course if you have the script you need python installed to use it.

Also i would like to see a "decrease window size" in all the dialogs.
I know it's possible.In fact it may already be implemented and i just am too dim witted to see it.
Too many times i can not see the submit or okay buttons when the dialogs open.Kind of frustrating when i use the flames plug-in. :\

Here are the patterns of OOo. It's 7zip because I had trouble with regular zip files.

:deskface:
I went to open it, and it defaults to WinRar, and I have 7zip installed too...