LightZone
Photoscape
ACDSee
JPEGView
Zoner Photo Studio X
Polarr
IrfanView
Fotor
UFRaw
Darktable
RawTherapee
airnef
GIMP
qDslrDashboard
Affinity Photo
Nikon Camera Control Pro
LightZoneBased on our record, UFRaw seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Why not just use https://www.rawtherapee.com/ or https://www.darktable.org/ to process raw files? You can still export from these as .xcf or tiff for further work in gimp if you like. Otherwise ufraw can be used as a plugin http://ufraw.sourceforge.net/ Https://digital-photography-school.com/opening-raw-images-in-gimp-with-ufraw-for-windows-the-basics/ (you mention "are only on linux" but don't mention your OS. Source: over 2 years ago
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Darktable - darktable is an open source photography workflow application and raw developer.
ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
airnef - Wireless download from your Nikon Camera!