Twidere - Tired of seeing ads and promotions in your timeline, being disrupted by tweets from bots and people...
Pawoo - Japanese Mastodon client with English translation.
Whalebird - Whalebird is a Mastodon client for desktop application.
AndStatus - A client for Twitter, Mastodon, GNU Social and Pump.io
Hyperspace Mastodon client - Hyperspace offers a clean, fast and responsive client for the Mastodon social network
Halcyon - A twitter-like web client for Mastodon and Pleroma. – Twitter like UI, familiar interface.