WordPress is a state-of-the-art publishing platform with a focus on aesthetics, web standards, and usability. WordPress is both free and priceless at the same time.
More simply, WordPress is what you use when you want to work with your blogging software, not fight it.
As easy as it is to use WordPress, it’s even easier to install a new theme. Simply download your favorite theme into the /wp-content/themes directory, unzip it and activate it from the admin control panel.