I'm adding new links to this page as crypto art blows up.
A quick video intro to SuperRare:
When I first fell down the crypto art rabbit hole, I found this epic list by obxium to be really useful.
Another super useful site is B.A.D. - The Blockchain Art Directory.
This article by Artnome is also a must read if you're interested in the origins of crypto art.
In 2019 I launched XERO gallery, displaying a collection of crypto art in the VR world of CryptoVoxels. All artwork was donated by artists and offered for sale with 0 reserve. All proceeds were donated to thewaterproject.org (minus platform fees). You can read about that in this SuperRare medium article. Visit XERO gallery in your browser here (currently closed for renovations).