There are:
Steemit https://steemit.com/
Minds https://www.minds.com/.. Zappl (twitter-like powered rewrite by steem)
Mithril https://mith.io/
Steepshot https://steepshot.io/
DSound https://dsound.audio/
Trybe https://trybe.one/
DecenTwitter https://decentwitter.com/


I can't tell which one of them  is the best though. But it's possible that steemit is the most popular.

My only problem with steemit is it not being  mobile friendly and the annoying display of earnings below posts. The displayed earnings are very distracting. This is one of the reasons I stopped using the platform.