After you have installed your WordPress blog, probably the first thing you will do is to find a great theme that you like and install it on your WordPress blog, the easiest way to get started is to download free themes.
There are quite a few sites that offer free WordPress Themes that you can download. In most cases they may require you to keep a link back in the footer to the site you get your theme to give credit to the author, but they are free to download and use.
You can check out the links below for some great websites that allow you to download Word Press Themes for free:
1. Free WP Themes
Free WP Themes contains totally free WordPress themes for your enjoyment.
Fresheezy is a fresh website where you can find index of free themes for WordPress. Users can also submit their own themes to the site.
Stupid Name. Fresh Themes!