Here's a fun little toy I ran across on the Internet the other day. As I was searching for mosaic resources, I came across this site that offered premade mosaics to interior designers and builders. Having once been an interior designer (of sorts), I was immediately intrigued. Here you can use a virtual palette to create random mosaics out of square tiles. It's not what I would choose for my home, but I did have fun mixing colors. Try the Mosaic Maximizer and see for yourself!
http://www.matthewweld.com/ - pastel painting
http://www.studio206.etsy.com/ - jewelry