More of my tangle patterns can be found at LifeImitatesDoodles.blogspot.com.
Here's an example done by Carolion:
Tangle patterns I've developed steps for. Feel free to use, print or share with others.
I'm not associated with zentangle.com and I'm not a certified teacher of zentangles.
Official zentangle patterns can be found in the Zentangle newsletter (http://www.zentangle.com/whats-new.php) or at Beez in the Belfrey (http://beezinthebelfry.blogspot.com/search/label/Tangle%20of%20the%20 Week)