It's from a blog contain a bunch of reviews of shoes like this, which all tend to be niche products that you won't see in the shops. Her reviews are very detailed and include links for more info.
I love the Baresteps blog and have got several good recommendations from it, for DC as well as for myself.
Fwiw, I hate heels so never wore them, but used to wear converse, winter boots with a broad 1/2 inch heel, etc. My back was utterly fucked up by these "normal" fairly flat shoes because of a problem mentioned by a pp - the toe box was pointy and meant I couldn't splay my toes as I walked, so they made me walk in a completely different way to how I walk barefoot (at home, on grass in summer, etc.). That way of walking put so much stress on my lower and middle back that I just though it was normal to have back problems in my 30s 
Then I did some research and found out about "barefoot shoes" that try to allow the same anatomical freedom of movement as barefoot walking/running by using thin flexible soles and a wide flexible toe box. I bought a pair on sale, built up gradually to wearing them all day (as advised), and by the end of 2 months I never wanted to wear any other type of shoes again. All my shoes are barefoot shoes now and I haven't had back pain for 3-4 years.
Not all barefoot shoes look as extreme as the ones in the picture above. Some look pretty mainstream, like these Vivobarefoot Chelsea boots (pic hopefully below)