- The Zentangle website
- The Zentangle Blog
- Tangle Patterns - Linda Farmer's ever-growing reference site
- This article on wiki-how is really very good, but the illustrations are quite misleading. Read the article and ignore the pictures.
Zentangle challenges (a few of what's out there!):
- I am the Diva, CZT - a challenge every week, and a wide variety too.
- It's a String Thing - focuses on the string aspect of zentangle
- Weekly Zentangle video - focuses on a particular tangle each week
- On Facebook, Square One, Purely Zentangle has a weekly 'focus tangle'. Now archived, but you can still see everything. Also has pages for black, tan, round, fun, and Opus zentangle.
Not zentangle, but terrific: