Compositio is a 2 column theme with a pleasing light blue colour scheme. The random squares used throughout the background add a special rhythm to the theme.
The template starts off with a navigation bar, below which is the header that is part of the main column, unlike other blogs where the header is spread across all columns. Here you can change the logo and add your blog description as well, while the main post column is pretty simple containing the regular features.
The sidebar has an integrated search box and small RSS icons to subscribe to posts and comments, after which there is space for About Me section. Compositio also provides you with the facility to include your Flickr photo stream and a tabber, which has become a regular feature in many templates lately.
The main reason for that would be because it saves lot of space and your readers can choose what they want to read.
Download the Compositio Blogger Theme