WordPress App for Android
'Write new posts, edit content, and manage comments on your WordPress blog.
WordPress for Android is an Open Source app that empowers you to write new posts, edit content, view stats, and manage comments with built-in notifications.
Version 2 brings an all new Dashboard UI with Quick Action bar and a powerful new editor that makes it easier than ever to post on the go.
WordPress for Android supports both WordPress.com and self-hosted WordPress (3.0 or higher) blogs.'
This is a free app