PXL

Focus on your sprite: pick a palette, paint on layers, import images and projects, export PNG. Shortcuts: ⌘Z undo, B brush, E eraser, F fill, V select, ⌘C/⌘V copy/paste selection, [ ] brush size, G grid, Esc clear selection. Layers and projects live in the toolbar. View % zooms the canvas (100 = fit); Cell is export pixel size.