Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
JS Kid Pix 1.0.2021 - Kid Pix 1.0 remade in JS/HTML
Pixilart - A drawing app for delightfully retro pixel art
Pixel Art Studio - A purpose-built drawing tool for pixel artists
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
Pixel Art to CSS - Draw and animate pixel art, export the results to CSS