PatternPad - Create beautiful geometric patterns
AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
MagicPattern - The best design toolbox with 10+ tools for anyone
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
GeometriCam - Photo mosaic/shape mosaic app
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.