iPhone: Day One is one of the best journalling apps on iOS. Now it also offers the ability to publish posts so people can view them publicly.
Currently, the publish option is only available in the iPhone app, but is on its way to the iPad version soon. To publish a post, all you need to do is sign up for a Day One account, write your post, and choose the publish option in the journal entry of your choice on your own personal Day One web page. Then, you can share those notes to any social network you want and Day One will keep track of stats such as retweets, shares and comments. If you've ever wanted to share the occasional Day One journal entry with the public at large, this is an easy way to do it.