Emoji Favicon generator is a multilingual tool for choosing a character (or custom emoji) and adding its SVG code to the browser tab for a webpage as a data URI.
Does your pet see Peripheral drift? is a slideshow of optical illusions to test on the vision of animals. Record videos of their (non) reactions for science!
Deconfiguration guides is an ongoing keyboard accessible list of instructions how to factory reset switches, routers, access points, etc. Dark/Light theme done with CSS variables.
Podcast bingo is a playable bingo game of phrases/actions for The Giz Wiz podcast. Copy/adapt the code for podcasts you watch/listen to.
Some open source hand-coded pages: