For the past while I've been building SimplePixelArt (https://simplepixelart.com/), a free pixel art editor that works in the browser, with no install and no account needed to start drawing. A few things it does that I couldn't find together in other free tools:
Tileset editor with autotile (blob/Wang) preview
Frame animation, exported as sprite sheets for Godot, Unity and others
Thousands of palettes to pick from
Image to pixel art converter
I mostly use it to draw small game sprites (16x16 to 64x64) myself. What would make you actually switch from Aseprite or Piskel? I'm trying to figure out what to build next.