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There are some different alternatives to Steemit, but these two are the most used:

https://busy.org
Busy is my favorite choice, because of its clean UI and features. Furthermore an official mobile app will be released soon (as stated here: https://steemit.com/busy/@jm90mm/busy-is-taking-over-bsteem).

https://zappl.com
Zappl is another common alternative to Steemit. This platform aims to become a sort of STEEM based Twitter.

My favorite alternative is http://busy.org :)

Steemit is a interface for Steem Blockchain.

Here are some of the alternatives:

Other than these there are many in local languages. Such as

https://steemkr.com/

Steemit is the first web interfaced platform built on top of the Steem blockchain.

As to the alternates, there are many others which is very similar to Steemit.com like:

Busy.org - https://busy.org
eSteem - https://esteem.ws
SteemPeak - https://steempeak.com

There are also others that are like decentralized copies of popular social sites like:

dLive (Twitch of Steem) - https://dlive.io
dMania (9gag of Steem) - https://dmania.lol
dSound (SoundCloud of Steem) - https://dsound.audio
dTube (Youtube of Steem) - https://d.tube
SteepShot (Instagram of Steem) - https://steepshot.io
Zappl (Twitter of Steem) - https://zappl.com

busy.org is an alternate site for steemit on desktop and also use partiko on mobile

you can try busy.org it is very good

There are many alternative site for steemit-

  1. https://busy.org/
  2. https://uogs.org/
  3. https://esteem.ws
    4.https://steempeak.com

You can also use dtube,dlive to post video,Zapple,Steepshoot app, dmania.lol.