One of my favorite YouTubers, “AppStoreReviewer” launched his very own iPhone OS application a few weeks ago.  And best of all it’s now free in the iTunes App Store.

ChillTwit is a simple and elegant Twitter client for the iPhone and iPod Touch.  The application has two features which seem to separate it from the other Twitter clients in the App Store.

First, you have the ability to change the background the appears behind tweets  and second, you can change the bubble colors from nine different options.

It may not be the most robust Twitter client around, but it includes all the basic features and functions you’d expect from a free Twitter client.  The layout makes Tweets very easy to read and the colors are a nice way to customize your viewing experience.

You can watch a video demo of the application here.

ChillTwit is available in the iTunes App Store.  Get it now while it’s still free.