Lazarus
Lazarus is a free guestbook script written in PHP that uses your MySQL database for storage and is based upon the excellent Advanced Guestbook script from Proxy2.
Lazarus has more features and several layers of anti spam protection to make one of the most feature rich and spam resistant guestbook scripts available for free. Version : 1.24
RicarGBooK
RicarGBooK is a guestbook system written in PHP and based on flat files. You can delete or modify any comment with an admin control panel. It's easy, simple and completely free!
Version : 1.2.2