Is there any decent Wordpress blogging client for Mac? On Windows I used to blog to Wordpress using Microsoft Word 2010 blog feature, but the Mac version is missing this feature.

I am looking for alternatives, preferably free ones. If you specify a commercial solution please include the price:  name (x$).

Please do not suggest generic text/html editors and submit different suggestions as separated answers.
You might consider Flock, a free, Firefox-based browser with many other features, including a built in blog editor. It's quite an unusual program, as you can also use it to manage your Facebook and Twitter accounts and feeds. It's worth a look.