Favstar

Favstar (also known as favstar.fm) was an online service that tracks Twitter and Twitter usage. Favstar uses data from user "favorites" - or when a Twitter post is bookmarked (starred) by individual users.
As posts, or tweets, are given more stars, specific posts move up in rankings according to different criteria, including recent posts, newer posts, and all-time favorites.
It was announced that "Favstar" would shut down operations on 19 June 2018.