Manage Content on Multiple sites from One Point - Just by selecting a dropdown, you can switch from blogging on Site X, to editing a Text/HTML module on Site Y. This speeds up your blogging and content management.

Image Management - drag and drop images right into Windows LiveWriter editor. You can resize them, apply effects like shadows, sepia and add a watermark. Your original image on your machine NOT modified.

Offline Editing - you don't have to be connected to the internet to write a blog post. Edit it on your computer, and when you are ready just publish to your blog.

Spell Check - built-in spell checking

Plugins - There are many plugins availalbe to integrage services like Flickr and maps.