There's also a Redbubble
The Redbubble is older and is NOT being updated anymore, but you can still order from there if you prefer. Fourthwall is the better option for me as the artist, so eventually I will be 100% on Fourthwall and closing the Redbubble.
There used to be an Etsy and a Ko-fi
I used to sell flower seeds, crafts, and digital downloads on Etsy, but they wanted me to give them my bank login information, and that didn't sound cool, so I didn't. And then I had a Ko-fi and it doxxed me whenever someone tipped me, so I stopped that. It looks like Fourthwall may let me sell physical items, so I'm getting those set up. If you have any tips about Ko-fi type stuff, please let me know!