I used to have a script, or plugin that opens Olympus ORF RAW files I gimp but I seem to have lost it. I made a special effort not to lose anything when I switched laptops but it seems that I didn't get everything. I searched the gimp plugin registry but couldn't find it. Does anybody have it or know where I can find it?

Ufraw

ufraw doesn't read orf files, I tried. Besides, I Already have rawtherapee and photivo.

Raw Therapee will open and send .*orf to Gimp.

Yeah i know, I just remember that here used to be a way to load them directly ito gimp. I can just use rawtherapee for it.

I just checked UFRraw with Gimp 2.8 32-bit, it opened a *.orf.
I used, File open in Gimp and UFRaw opened up.
I have UFRaw (ufraw.exe) installed in Program Files, Gimp plug-ins (ufraw-gimp.exe) and Gimp bin (ufraw-batch.exe).

hmm, ufraw didn't even see my orf files. Maybe it was missing a dll or something.

I just checked my *.dll's and got an idea. I had a problem with a program using tiff's and Gimp in the past. My hack was duplicate "libtiff-3.dll" rename duplicate "libtiff3.dll" (see below).

Here's a list of mine.
C:\Program Files\UFRaw\bin\
libglib-2.0-0.dll
libjpeg-7.dll
liblcms-1-ufraw.dll
libpng12-0.dll
libtiff3.dll
libtiff-3.dll
bzip2.dll
lensfun.dll

C:\Program Files\GIMP 2\bin\liblcms-1-ufraw.dll

I'll give that a try. Rawtherapee and photivo both import into Gimp so I can do it that way. I'm not crazy about photivo because of the weird menu layout but rawtherapee works well and is designed better.