piCSSel-art - Draw pixel art with CSS!
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Sketch - Professional digital design for Mac.
JS Kid Pix 1.0.2021 - Kid Pix 1.0 remade in JS/HTML
Invision - Prototyping and collaboration for design teams