I have tried all but pdn is the best software for quick editing. In the time it takes for Krita or GIMP to launch, I'm already halfway in pdn. I really miss it when using Linux.
For Linux there is Pinta, which is a very similar UI to pdn. It works well enough much of the time but I've found it way more unstable than pdn (and without the plugin ecosystem).
I'm not sure what it is on my machine(s), but I've found Pinta to be very unstable. It'll crash to desktop without warning in the middle of random operations. If it would just work reliably it's the paint app I want to use.
Pinta actually uses an older version of the paint.net image manipulation functionality from when Paint.net was open source, with a rewritten UI (in gtk# if I recall correctly, compared to WPF for Paint.net). However, that new UI is significantly inferior to Paint.net's. One example - last time I tried it, the "marching arts" to highlight selections was sized in terms of pixels in the source image. It was always 1 source image pixel wide, rather than 1 screen pixel. This significantly hurt its usefulness for pixel art type situations.
lpribis|1 year ago
mysterydip|1 year ago
Macha|1 year ago