I feel like the the two major ones that keep coming up are: Google Reader & NewGrounds during the golden age of Flash. Both could be revived for the TikTok era.

I feel like the the two major ones that keep coming up are: Google Reader & NewGrounds during the golden age of Flash. Both could be revived for the TikTok era. But would probably reflect usage today: mobile native, algorithmically curated, etc.