TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Twidere - Tired of seeing ads and promotions in your timeline, being disrupted by tweets from bots and people...
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.
Hyperspace Mastodon client - Hyperspace offers a clean, fast and responsive client for the Mastodon social network
TweetCaster - TweetCaster is a third-party Twitter mobile app that is available on Google Play and the Apple App Store.
Pinafore - An alternative web client for Mastodon, focused on speed and simplicity.