Tweetdeckr!

TweetDeck aims to evolve the existing functionality of Twitter by taking an abundance of information i.e twitter feeds, and breaking it down into more manageable bite sized pieces. From a poster's point of view, it supports shortening URLs by a couple of different services, posting and hosting images at different sites, and scheduling tweets to be posted even if you're offline.

Tweetbot is a full-featured Twitter client with a lot of personality. Whether it’s the meticulously-crafted interface, sounds & animation, or features like multiple timelines & smart gestures, there’s a lot to love about Tweetbot.

Tired of seeing ads and promotions in your timeline, being disrupted by tweets from bots and people you don't like, or just want a pure Twitter experience back like the good old days? Try Twidere for Twitter!

Linux Twitter client designed for multiple columns of multiple accounts.

Echofon: social apps for Twitter and Facebook.

Twitterrific is a fun application that lets you both read and publish posts or "tweets" to the Twitter community website. The applications user interface is clean, concise and designed to take up a minimum of real estate on your Mac or iOS device.

Uvibo is a twitter visualization dashboard.

Janetter is a Twitter client application.Faster, smarter, and more powerful.The best Twitter client on the net!

Free desktop app designed to replace and improve upon the discontinued official TweetDeck client.

Falcon is a powerful widget that brings a full Twitter client to your homescreen !

Terminal-based Twitter Client with Streaming API support. Only supports Ruby 1.9 and later.

Twicca is a Twitter client for Android that is simply awesome.

Rainbow Stream is a smart and nice Twitter Client on Terminal.

YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts. It provides powerful functionality through simple user interface.