This plugin replaces the (imho strange looking) white header of a Known (withknown.com) site when you are not logged in. Instead it shows just two icons; one to go back to the main site and one to login. If you are logged in however, everything stays as it was and the usual header is shown.
Clone this repository, rename the directory to SmallHeader and put it inside your IdnoPlugins directory. Afterwards activate the plugin in the administration interface. Woosh - the header is gone (at least when you are not logged in).
This plugin was initially created at a meeting of the Homebrew Website Club Nuremberg. If you are interested in hacking on your site come join us. Check the dates at the IndieWeb web site.