GIMP of course.

KPaint

Use KolourPaint, it's a windows 9x/XP paintbrush clone with only a few improvements tacked on.

Photocraft has been working alright for me. I really struggled to learn GIMP, and I haven't found any easy lightweight image editing tool that replaces Paint.NET for me before trying Photocraft. It's still a little confusing since I'm not used to photoshop-like bindings and layout, but it hasn't been too hard to adjust. (I also only ever use it for small simple edits, drawing, cropping, color gradients, background removal, etc.)

There is paint.rs[0] as well which is intended to be paint.net open source alternative which works on Linux.

I’d be interested to know what you think about it

[0]: https://github.com/daijro/paint.rs

I wish people would stop naming software after the implementation language.

Thank you for showing me this!

I tried it out, and it's a pretty good clone. It serves my muscle memory well, with a few hiccups like drag-and-drop image onto the window doesn't work exactly the same, the save menu is a bit different. But there are also some pretty good improvements, like the addition of text layers (text got rasterized immediately after loosing focus in paint.NET which made it HORRIBLE to work with. This change is super welcome). There are also a bunch of new "plus" menu items that it seemingly gets from PhotoCraft? Not sure if that's because I have PhotoCraft installed, or if it comes with those features bundled. I'm not sure how good this is, because Paint.NET menus were already quite bloated and confusing to navigate, so this makes them even more cluttered with for example "Hue / Saturation" next to "Hue / Saturation +". The UI windows can't be dragged out of the paint.rs window like they could in Paint.NET. I think this is also faster than Paint.NET was.

I like this, it's quite good. I would like a more modern UI though, ideally using native GTK elements. Though that raises and interesting question of how much should a re-implementation veer away from the original. I think I'll keep this as a backup if I get fed up with PhotoCraft.

Perhaps Gradia [0], Pinta [1], or Krita [2].

[0]: https://gradia.alexandervanhee.be/ [1]: https://www.pinta-project.com/ [2]: https://krita.org/en/

Thanks for mentioning gradia. That seems perfect actually

I easily modified pinta to do exactly this. You mean overlay, right? It can overlay, draw, manipulate, and I added a better file navigator so I can see which imagery I want to overlay to begin with. My use case was scientific in nature. What is yours, if you don’t mind my asking?

IrfanView in Wine, f12 opens a really old-school paint toolbox.

https://photoflare.io/ is the one I've found to be most usable. Pinta is just unpleasant to use at high resolutions and it's buggy.