B2evolution is a powerful free open-source (GPL) blog tool software that you can install on your own website.   I tried it, I liked it, now I use it here on my blog Ramblings from Mr Bump

I tried wordpress, blogger, but none-compare to the ease and use of B2evolution blog script.  This free script includes many features such as file and photo management, blog post advanced features, and even a ping list for blog promotion.

This free open-source blog script runs on any webserver featuring PHP and MYSQL!  You can learn more and pick up your free copy here: B2evolution.net

The great thing about hosting your blog on your own website is that your website benefits from the SEO generated by your posts.  Which helps your website rank among the search engines.