Swift basic is the free version of the popular wordpress theme Swift.
http://swiftthemes.com/2012/06/updates-2/swift-v6-2-0-is-here-new-color-schemes-distraction-free-color-options-and-more/
http://wordpress.org/extend/themes/swift-basic/
Apart from having a very simple and easily customizable layout, here is the list of features that make Swift special.
* Three built in color schemes
• Clean responsive layout with a text widget specific for mobile layout. This widget is not displayed/loaded when the site is viewed on mobile device.
• Neatly grouped color options where users can customize almost every element of the theme.
• Option to import color schemes and share it with other Swift users. Planning to start a market place where users can sell/buy color schemes very soon.
• Probably the only theme on the repository to have nofollow credit link.
• Plugin compatibility settings where users can disable certain styles from the theme if a plugin causes problems or CSS rules clash.
• Only the CSS and JS your theme configuration needs are loaded.
• Uses base64 images to reduce the number of http requests.
• Context aware hooks http://swiftthemes.com/hooks-and-filters-in-swift/
* Custom widgets.