Admbook is a guestbook written in PHP that uses a text file for storing data. 

Features of Admbook:
- database not required
- allows to delete and edit messages through a web interface (admin only)
- allows for admin to reply messages (admin only)
- parses all HTML tags except: <b>some text</b> <i>some text</i> (can be turned on/off [admin only])
- url's in message http://your.domain or http://your.domain:8080 converted to links http://your.domain (can be turned on/off [admin only])
- splits long words into pieces by nn characters (number of chars can be set through a web interface (admin only))
- breaks message list into pages (number of messages per page is adjusted through a web interface (admin only))
- replaces text smiles with picture icons (e.g. ;) -  or :p -  ) (adjustable (admin only))
- filters unwanted words contaning in dictionary (words can be added through a web interface [admin only])
- protection from 'flood'
- ip black banlist (ip can be added through a web interface [admin only])
- optional registration