TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
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.
Plume - App for writing documents, scripts, books and more.
TweetCaster - TweetCaster is a third-party Twitter mobile app that is available on Google Play and the Apple App Store.
Flamingo for Twitter - Flamingo for Twitter is a bright and colorful Twitter client that comes with a simple interface.