Pattaizer is an interesting tool which transforms digital images into mosaics or abstract computer art.
The program 20+ algorithms to explore. Some are simple mosaics, perhaps replacing blocks of pixels with spheres, hexagons or lego bricks. Others preserve more detail, including a "Broken Glass" option which displays the image through scattered glass tiles. And a few are almost entirely abstract, replacing the source image with a range of geometric patterns.
Basic operations are straightforward: select an algorithm, click "Update mosaic" and view the results.
Every algorithm may be customised with a range of options and settings.
The finished results can be saved as JPGs, BMPs or PNGs.
Pattaizer's finished results can range from amazing to pointless, depending on your source image and algorithm. Expect to spend a while fine-tuning your image before you get anything worthwhile.
Please note, the program's licence is a little vague. Apparently some features will disappear after a period of time, but which ones, and how long? The developer forgot to say. There are no immediate restrictions, though - no watermarks, no resolution limits - so we'd say download and try it out anyway.