I learned of a new app today Waterloque which works on iPad and iPhone by turning photos into watercolor photos. I tried it on a photo I had taken of my river from the bridge on a walk home from a hockey game. I loved the effect.
TFL
Used the following by Anna Aspnes
ArtPlay palette Happy Life - http://www.oscraps.com/shop/product.php?productid=46756
Mulitmedia balloons - http://www.oscraps.com/shop/product.php?productid=46755&cat=398&page=1
Magic Sprinklez #9 - http://www.oscraps.com/shop/product.php?productid=46092&page=1