Zentangle Challenges in case you've missed some or haven't stopped by in awhile after the picture are listed. Especially this one!
Tackle it Tuesday: challenge posts on Tuesday. http://cherylsartfulcreations.blogspot.com/?m=0
I am the Diva Zentangle Challenge: posts on Mondays.
That's New to Me Challenge: posts on Sunday or Monday's.
Tangle Me Three Challenge: posts on Sunday or Monday.
Joey’s Weekly Zentangle Challenge: posts on Mondays
It's a String Thing Zentangle Challenge: posts on Tuesdays
Every Inchie Monday: posts Sunday/Monday
Two by Tuesday: posts listed on site:
Diane and Carolien's Zentangle Challenge: Wednesday posts.
The Bright Owl Zendala Challenge: posts periodically on Monday or Tuesday's.
Square One-Purely Zentangle: find new posts on Friday on Facebook under the title.