It seems like each editor has their set of features and none of them has most of the typical features. At least I feel like something is always missing. What I miss are two I guess basic features. First one is drawing with right (secondary) mouse button (color or eraser etc). This for some reason is "context menu" in many programs, or something like that. As a developer I know this feature would be really easy to add as an option.

The second feature is tiling which is some kind of (easy!) way to see if the tile is repeating smoothly from the edges. In some editors you have this as N x N tiles preview. This is also really easy feature to do. I don't know. Does anyone else find this annoying? That you have editors which are quite nice, but they are just missing some features that makes life easier. Of course I'm in the slow process of putting all these in my editor, but I find there are other features and things which are way harder to program and they make it non-trivial to release new pixel editors.