Janetter - Janetter is a Twitter client application. Faster, smarter, and more powerful.
Talon for Twitter - Elegantly designed, ad-free Twitter experience for Android
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.
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
Tweeticide - Tweeticide – Delete All Tweets is a commercial app that enables you to delete all of your tweets at once.
Owly for Twitter - Owly for Twitter is a best-in-class mobile app that comes with a variety of features to help you stay ahead with fresh trends and news to convey your thoughts in a revolutionary way.