>>953374
Can we have something more robust like Kleki? It's open source.
https://kleki.com
You can flip & rotate the canvas, move & transform layers, change opacity & blending mode of layers, change brightness + contrast or curves, there's blur, smudge brush, blending brush, different brush shapes, shape drawing tool, text tool, gradient tool, line stabilizer like PaintTool SAI. You can even paint inside anti-aliased lines that are on a different layer & set the fill to expand under those lines slightly so you don't get white pixels around fills.
See my example. The anti-aliased lines are on the top layer titled "Lines" while the green fill is under the lines on the "Colors" layer. This is accomplished by telling the fill tool to "grow" by 2 pixels so the green will go underneath the semi-transparent pixels on the edge of the black lines. This is how you fill within smooth lines without getting white pixel artifacts, you do the fill colors on the layer below. Many are probably aware of this method if they're familiar with digital art programs, but even novices can do it if the tools make it easy.
It also has keyboard shortcuts that are practically standard across this kind of software. Such as holding spacebar to pan the canvas, holding R to rotate the canvas, holding Shift while clicking to make straight lines, bracket keys to change brush size, scroll wheel to zoom, etc.
Of course it's not a replacement for desktop software. Things it lacks are a lasso tool to select specific things to transform & tools for doing halftone dithering. It has a lot of what anyone would need though. Just the fact that you can flip & rotate the canvas + the keyboard shortcuts helps a lot.
The Oekaki tool we have does some weird shit when doing fills like it's remembering lines you've removed. I don't know if that's part of some replay feature or what, but it's unused here as far as I can see.