Notes with hypertext.

nostr:npub1p4kg8zxukpym3h20erfa3samj00rm2gt4q5wfuyu3tg0x3jg3gesvncxf8 came up with it at #SovEng.

https://github.com/futurepaul/hypernote/

If you standardise their size (say 640 by 380 px), I think you can do reeeaaally cool stuff with this.