CyStats is a statistics system including information about blog, hits, clients, and more.
File Icons adds icons via CSS to your links.
Firefox Detective places a ‘Download Firefox’ graphic on your blog for your IE readers.
Homepage Excerpts makes blogs that use full posts on the homepage more search engine friendly and gives flexibility to people that want to use both full posts and excerpts on the homepage.
More Link Modifier allows you to modify the link that is displayed when you use the feature.
Plugin Downloads shows your plugins hosted on http://svn.wp-plugins.org/ and summarizes the download statistics.
Sociable Zyblog adds links on your posts to popular social bookmarking sites.
there a few useful, but the forst plug is in german, to other people… cheers!!!