One of the "other stuff" parts of Nostr that I've enjoyed has been website readers and highlighters. This has been a bit under-developed, but just recently we've got @Boris by @Gigi and Stash by @laoc42 .

The latter works better for me at the moment, Boris can't seem to load web pages for me... I get some "401" error. But both seem to have active development, so that's great!