Tools for working with images
Picartia.com
Basic version free. Create a photo mosaic online. Free version provides only 10 megapixel file which is suitable for online use. For printing you'll need to upgrade to paid account.
Memolane 
Memolane captures your entire online life in one timeline. View and explore your photos, music, tweets, updates, check-ins, blogs and more from all of your online services in one place.
PiZip 
Free online photo editor featuring photo effects, photo stickers and one click effects for your digital photos. Store online and share your images via galleries. Add comments to other galleries. Third party advertising on site.
MacOSaiX (Mac)
Free. Make a mosaic picture online from your own images. Easy process 1. Choose the image from which to make a mosaic. 2. Choose the shape and number of tiles in the mosaic. 3. Choose the sources of images for filling in the tiles.
