The Block Editor project for WordPress and beyond. Plugin is available from the official repository.

Sup.js saves URL parameters and inputs them into any form submitted during a visitors session on you site.

Mac screensaver for counting down to a date

Slam Dunk JavaScript

Video discussing this curriculum:

fullPage plugin by Alvaro Trigo. Create full screen pages fast and simple

multiscroll plugin by Alvaro Trigo. Create scrolling split websites. https://alvarotrigo.com/multiScroll/