I've had shirts print at Shirt.woot, Threadless, Design By Humans, TeeFury, Ript, GoodJoe, and more. Many of them are out of print. Dang! But these aren't...
my entire Shirt.woot catalog
Shirt.woot has recently opened up their entire catalog of daily prints (five year's worth) for digital printing. This includes my all-time top sellers Fat Unicorn, Shhhhhhh! and Squeeze. They also recently ported in many of my designs from Threadless and elsewhere whose rights I got back. Below is a link to my 70 designs. AND, Shirt.woot recently started offering American Apparel as an option, which is AWESOME.
My store at Design by humans
I picked a few of my favorite designs that I had rights to and set up a shop with Design By Humans. A lot of it is also available as prints, phone cases, etc.
My store at Threadless
In addition to official Threadless prints, I've also got a shop with them. A lot of the designs are also available as prints, phone cases, etc.
Others
Check out Star Power, my collab with Kasey Fleming, over at Threadless. Not sure how much longer it will be up for sale...