UXP2 Dark Patterns is an interesting website that describes five different types of dark UX patterns, such as sneaking and forced action, and provides a name and shame list of sites using these patterns against their users.
David Galles atthe University of San Francisco created a fantastic website with animations that visual data structures and algorithms as they are executed.
Max Boeck has created a starter kit for building an emergency information website. The kit includes statically generated files, basic styling to help with accessibility, offline operation via a service worker, and is optimised for one ciritical roundtrip request with inline resources.
Compressimage.io is a browser based image compression tool that runs completely in the browser, meaning it works offline, is completely private, and results in zero server side emissions because there is no server!
Smashing Magazine put together a very useful list of starter kits and boilerplates that you can use to build websites quickly, using a number of web languages and frameworks, form PHP to Vue.js.
The Web Interface Handbook is a valuable resource of do's and dont's for web interface development, covering topics such as layout, forms, buttons, and patterns.