I've purchased a variety of items online from Papaya! over the years, including an address book, accessory pouches, a bucket tote, legal pads, greeting cards, and spiral notebooks. They have a wide variety of colorful designs, and they new designs and new products fairly often. There's also a physical store in Ashland, Oregon, that I hope to visit one day.
Here are direct links for some of their stationery products I use regularly:
Lovely Legal Pads
Greetings Cards (always lots of options here)