Zentangle has been around for a while now, and a lot of fabulous places for inspiration have popped up all over the internet. here are my favorites, in no particular order, as I remember to add them. this page is for me, too! additionally, there are thousands of books on Zentangle to be had, even apps for your phone!
Zentangle (official site)
Zentangle Blog (free subscription, new tangles fairly often, lots of ideas)
TanglePatterns Directory (get on the email list, it’s good)
Enthusiastic Artist (Margaret Bremner, prolific, creative)
A Little Lime (Helen Williams)
Yoga for Your Brain (Sandy Steen Bartholomew)
ShellyBeauch (Michelle Beauchamp, really lovely work)
TangledInkArt (Sue Clark, prolific, creative)
ATangleOfTiles (Judy Bastin, a new CZT like me)
Diva Weekly Challenge (so fun, very supportive of any level; her Zentangle story video below)
This is my favorite art book, it has a wonderful story about the artist in all of us.