There are many resources where you can get your hands on plenty of doodley patterns to draw in your projects.  Here are just a few:

Doodle Patterns Online:

LineWeaving.com/forums– One of the largest pattern libraries online!  Over 500 patterns by more than 95 different pattern designers!  Lists are indexed by pattern name and by designer name too.  Plus more ways to sort and view in the pattern gallery.

TanglePattern.com – This site is run by Linda Farmer who has the goal of  “providing an index and guide to the tangle patterns found online, and how to draw them.” When selecting which tangled patterns she includes on her website she tries to choose those that most reflect the Zentangle® art method.

Free Hand Doodle Patterns (Flickr Group) – Doodle patterns submitted by various doodle enthusiasts.  No sorting options, but lots and lots of patterns submitted by Flickr members.  Over 900 items in the group pool!

My Little List of  Doodle Patterns – As of this writing I have over 200 zendoodle design patterns to my name.  I haven’t blogged about all of them yet.  But as I do you can find the postings by clicking on the “My Doodle Patterns” link from any page of my blog.

Let me know of other lists you’re aware of!
~ Cindy