spring browser (app) + nostrapp.link site: nice overview of what is out here

primal.net site: mainpage popular notes/highlights per day, on the right side of the screen

nostr.report site: weekly recaps and if i remember correctly, a weekly spaces talk on nostr.nests

manually:

i also regularly randomly decide to browse the profile of jack and dergigi (they often boost new, interesting projects)

i dont do this myself, but you can also try opensats.org on nostr and see what nostr projects (new and old) are being chosen to receive grants