BrandBird - Brand your Twitter content uniquely
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.
Supercat.app - Turn your Product Hunt comments into beautiful images
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
tweet.pics - Add a unique brand to your images to make them really pop on Twitter.
HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.