An open source self hosted notes and bookmarks taking web app. Looks like of like Pinterest and kind of like a kanban board. PHP, so it could be run in shared hosting.

Written as a PWA so in theory you can take it with you. Or at least the user interface, I don't know about the back-end database.

A Pixel Art Editor. Self hosted. Single page app. Draw old-school pixel art by hand in your web browser, save the images locally. Can assemble frames into an animated gif. Can even import an image file and turn it into an approximate pixel art image. Can be installed as a progressive web app but good luck getting those to work.

A free, fast and beautiful API request builder (web alternative to Postman) used by 60k+ developers. Play around with requests when developing against an API. Supports all HTTP verbs. Is technically a PWA.

Online demo (in devtools): https://postwoman.io