Based on our record, Invision should be more popular than UFRaw. It has been mentiond 3 times 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
Search for UI/Design/Firma Tutorials on YouTube, check out UI related Blog posts on invisionapp.com, check out UI Inspiration muzli. Source: over 1 year ago
We have 100s of different screens to migrate as well as a really large design system, and to date we've been successfully using the invisionapp.com website to keep things really well organized and easy to navigate with tags, pages, etc. We've enjoyed this system so far because it's easy for PMs and Devs to navigate in a website format, without having to learn the design software or get bogged down in artboards. Source: almost 2 years ago
Other options: explain everything whiteboard, invisionapp.com. Source: over 2 years ago
Darktable - darktable is an open source photography workflow application and raw developer.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
Zeplin - Collaboration app for UI designers & frontend developers
LightZone - LightZone is a digital photo editor software application.
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.