The GHNS standard is now maintained at http://ghns.freedesktop.org/.
On this page, related software which doesn't find a home elsewhere can be hosted. For the time being, the only software available is jGHNS, a not yet functional Java library to access content from GHNS, and DXS Client, a small perl tool to access the DXS on the command line along with a sample webservice. Also Cocodrilo, a PHP-based database access and template system, can currently be found here.