Desktop Google Reader is a desktop client to Google's popular RSS agregator services. It is focused on on the most important things you do with Google Reader - read, mark as read and starr items. In addition and in combination with the notification system Snarl (see http://www.fullphat.net/ it gives you nice popup notifications on your newly arriving news feed items. Please let us know which features you would like to have at http://desktopgooglereader.codeplex.com/Thread/View.aspx?ThreadId=66172.
It needs the .NET framework 3.5 SP1 in order to run.