What are some alternatives?
When comparing Pixel Pix and Aseprite, you can also consider the following products
Responsive Pixel Art - It's exactly that... responsive pixel art 🙃
Piskel - Piskel is a website where designers online create sprites or pixel art.
piCSSel-art - Draw pixel art with CSS!
Grafx2 - GrafX2 is a bitmap paint program inspired by the Amiga programs Deluxe Paint and Brilliance.
Pixel Art Studio - A purpose-built drawing tool for pixel artists
GraphicsGale - Supports many formats, including . ico, . gif, . avi, .