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.
Twitterrific - Twitterific is an app that offers several functions and fun features for your Twitter account.
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Flamingo for Twitter - Flamingo for Twitter is a bright and colorful Twitter client that comes with a simple interface.