Awesome content on the web, in random order.
WebAIM provides some very interesting documentation on how to create a web with web accessiblity in mind.
Tyler Sticka published an article on cloudflour where he presents an awsome library he made which allows you to create svg placeholders for img-elements.
A brilliant post by Max Böck on how to get incoming and outgoing Webmentions for example via Bridgy and webmention.io and how to handle and filter the data to be able to finally implement webmentions on your website.
Sam Larsen-Disney published an super interesting article about how he's is displaying stats like real time visitors, pageviews, theme toggles etc. and put that in some awsome UX where i also took some inspiration from.