A free program for Android, by Preekog.
Pixel Fog Photo Editor is an easy-to-use photo editor app that gives you a fun way to add a pixelated effect to your photos.
Pixel Fog Photo Editor app will take a photo from your phone or select one from the gallery and then use its powerful editing tools to turn it into a pixelated image, with lots of different color effects to choose from.
You can choose from one of the predefined color sets or make your own, using a color picker. You can also choose the size of the pixels, and you can even create your own custom color.
Once you’ve got the image you want, you can add effects to make it more interesting, including a photo-styling tool that lets you crop, rotate, and zoom the image, as well as a tool to draw on the image.