Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
Pixel Art Studio - A purpose-built drawing tool for pixel artists
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
Pixilart - A drawing app for delightfully retro pixel art
Mosaic Creator - Mosaic Creator is professional mosaic tool. You can create your own picture mosaic.