Blu is another twitter application which I like a lot. The application is created using WPF, I like their design a lot and also the feature they provide.

The main features I like

1. Inline Replies: You can reply to anyone by clicking his tweets.
2. See the full conversation: You can see the whole conversation between two of your friends.
3. Tiny URL integration: Copy and paste any URL and it will be converted to be tiny.
4. Choose your favorites: Mark people as your favorites and you will have them in different window, I like this feature a lot as I know people who tweet every 30 seconds.

The main features I wish it was there

1. To have the program download-able and I don't have to install it from the website.
2. To have sound indicator and visual indicator when ever I receive new tweet.
3. To be able to minimize it to tray bar although I always use minme for such application.

 As a total experience and as their first version, I like it a lot, and I recommend you to use it.