Free extensions for Joomla!

I am using Xmap on a Joomla 2.5 site, but the weblinks plugin does not appear to work.

http://www.knowitall.ch/index.php/knowitall-site-map

If you scroll down and click on any of the links created under Links, they take you to a blank page.

I see the plugin I have used is dated April 2004. Is there a more up to date Joomla 2.5 compatible version?

Thanks