Whalebird - Whalebird is a Mastodon client for desktop application.
Ice Cubes for Mastodon - A SwiftUI Mastodon client for iOS.
Hyperspace Mastodon client - Hyperspace offers a clean, fast and responsive client for the Mastodon social network
Qvitter - UI for GNU Social that is similar to old twitter designs.
AndStatus - A client for Twitter, Mastodon, GNU Social and Pump.io
Pinafore - An alternative web client for Mastodon, focused on speed and simplicity.