In late 2009 and early 2010 I worked on a very interesting cloud computing project. In the process I accrued a fairly comprehensive link list on the topic, which I already briefly mentioned here. The list was also published on the blog of my back then employer, but since the company doesn't exist anymore and their site is offline, I figured I might as well put it up here. The gist where I originally collected this is still on GitHub, feel free to fork, add etc.
"This site is designed by Duo Labs to test the new W3C Specification Web Authentication. WebAuthn is supported in the Chrome, Firefox, and Edge browsers to different degrees, but support for credential creation and assertion using a U2F Token, like those provided by Yubico and Feitian, is supported by all of them. The code for this demo can be found here on GitHub. To read more about WebAuthn and what is does, check out webauthn.guide for an introduction."