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FOSS Image editor
(discuss.tchncs.de)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
I mostly use GIMP.
I am also enthusiast about the https://graphite.rs/ project which is working in browser (love it or hate it for that).
Krita is amazing for drawing but may be intimidating.
I like MyPaint that I use as a whiteboard. It is easy to use and convenient