Free For Alls

These collaboration systems let participants add arbitrary references to a single, unorganized list. These include guestbooks.

The Free For All at NCSA allowed you to add items to a single uncontrolled list. But it is defunct. I offer a HyperNews Free For All in its place.
ARTEMIDE's Guestbook
MacHTTP People can register themselves.
Another annotations page for some interesting images.
Chris's Graffiti Wall has a variety of anonymous off-the-wall comments.
BiancaTroll has non-anonymous guestbooks and anonymous graffiti walls.
The Mechanical Bull Free-for-All at the Creative Internet.
Ask Joe is not exactly a free-for-all, but close enough. You ask Joe for social advice and he may include his answer in his next column.
New Year's Greeting that you can add to.
Find the SPAM might fit better under collaborative creations.
Dave's Site Chock Full O'Random Links - enter a URL and select a button color to be added to this list of buttons.
Matt's Free For All Link Page - enter a title, URL, and select a section.
Yahoo - Reference:Indices to Web Documents:Free for All Pages
Guestbook is a general system for creating your own guestbooks.
Lpage offers guestbook software and service.
The Internet Wall
mhttp guestbook is written in Mumps for the mhttp server.