Solstice Mandala Project Day008 by OrgeSTC.deviantart.com on @deviantART
zentangle pattern tutorial
Korall - this is a fabric pattern, not zentangle, but fitting for it, and looks great drawn on paper. Don't have name of the fabric designer. Go to website.
LOVE THIS ONE: You don't have to fill your tile or keep things centered. Here's what Maria did with a variant of pokeroot and pearlz.
IMG_0013 | Flickr - Photo Sharing!
Has so many sites and tutorials for zentangles http://pinterest.com/bdeegan/zentangles-and-doodles/