Yihaw lets you build and maintain a hierarchial directory of links, files, news items etc.
In fact it does two out of the "Big Three" usability guru Jacob Nielsen describes in his article "Intranet Portals: The Corporate Information Infrastructure". Okay, it does more than Yahoo! I'm not replicating them - just inspired by them.
Yihaw represents a different viewpoint on how to build a portal than the Zope PTK product. PTK uses the concept of a personal workspace, whereas Yihaw uses a shared workspace.
There is still some assembly required to integrate it into your environment, but I have included a set of convenience methods you can insert into strategic places on your website. You find them in the Product folder.