Twiterrific : Twiterrific is the most poular mobile Twitter client that’s beautiful to look at, easy to use and chock full of elegant features. Twiterrific supports multiple accounts, faster twitter search, tweet filtering and much more. has its own webkit browser, so when you click a link, you don’t actually leave the app the link will open inside the Twiterrific.  The only verdict with free version is advertisements which can be overcome by pro version. Twiteriific is the winner of  Apple design award. 

TwitterFon : TwitterFon is the ideal twitter client for serious or advanced twitter users. It has a simple, clean and obvious user interface. It has excellent camera support and all twitter standard features. The best part of Twitterfon is Messages show up in conversation style so its really easy to follow what you have both said about the topic.TwitterFon doesn’t supports multiple user accounts. So if you have two or more twitter ID TwitterFon isn’t a solution for your iPhone.

Twittelator : The elegant design of Twittelator makes your social networking experience very smooth.  Twittelator uses a bubble method, similar to how the SMS app has bubbles. The best part of Twittelator is the free app version is also free from the annoying advertisements. It support picture from both camera and library and maps of your location. Twittelator supports built in web browser to view external links.

SimplyTweet Lite : Do you like UI of iChat then SimplyTweet is for you it’s UI is very similar to iChat. Free version supports direct messages, including browsing list recipients and auto completion. For uploading pictures SimplyTweet uses both TwitPic support and Posterous Support (multiple photos).

Twittervision : Twittervision supports most powerful inbuilt translation tool. You can translate tweets from other language to english and from english to other languages also. Twittervision allows you to view global posts, post an update, follow, as well as search for posts containing a term. Twittervision also includes a powerful Twitter search feature that lets you track conversations on specific topics.