The 1.0 version of QuickPress for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X was originally produced by Andreas Kihlberg. The application lies within Communication Tools, more precisely Social & Blogging.
From the developer:
QuickPress allows you to publish posts to your Wordpress blog. It supports multiple Wordpress blogs, both self hosted and Wordpress.org hosted blogs. QuickPress uses the XML-RPC Api to create posts and adds an icon to the statusbar so you always have access to publish posts.
You may want to check out more Mac applications, such as Hahlo, Showit or Facebook for Adobe AIR, which might be related to QuickPress.