This is a very nifty use of a service worker—choose a local folder that you want to navigate using HTTP rather than the file system.
A very comprehensive directory of accessibility resources.
A directory of progressive web apps.
Here’s a handy directory of scripts that set out to solve one problem without any dependencies. Useful for poking at, picking apart, and learning from.
The latest creation from Simon and Nat. It's surprisingly addictive and useful — play around with it for a bit and you'll see what I mean. Lovely stuff.