Lars Ellingsen's Guestserver
- Supports several languages & multiple users.
- http://folk.ntnu.no/larsell/guestbook/

Free Perl Guestbook (FPG)
- A one-file-program guestbook written in Perl. It is multilingual and easy style editing, with built-in Banner Killer for using on Free Space Providers. [Freeware]
- http://www.vitinh.de/cgi-bin/download_guestbook.cgi

EZGuest
- Supports multiple guestbooks allowing hosting for others.
- http://www.mannyjuan.com/ezguest.htm

Active Guestbook
- A free guestbook.
- http://www.active-scripts.net/

Rock13.com Webhelp - gb.cgi
- Distribution site for gb, a simple Perl CGI guestbook.
- http://rock13.com/webhelp/perl/gb/

VizBook
- A guestbook list style Unix cgi script written for Perl 5 requiring Sendmail. [Freeware, if use the script as is without changes]
- http://www.dtp-aus.com/cgiscript/vizbook.shtml

Jason's Guestbook
- Includes automatic e-mail features.
- http://www.aestheticsurgerycenter.com/scripts/guestbook/

DoubleMessageBoard
- message board cgi. it is more than a guestbook and less than a full fledged bbs.
- http://visitware.com/sobaya/dmb0.html

Gbook.cgi
- Perl Guestbook CGI Script for use on Unix (Linux) web servers. Highly configurable look. Allow or deny HTML tags.
- http://www.patrick-bernau.de/gbook/

BigNoseBird's Guest Book
- fairly easy and versatile, with many useful features.
- http://bignosebird.com/carchive/bnbbook.shtml

Guestbook*Star
- Lets create a Guest-book and its CGI with no programming experience.
- http://www.webgenie.com/Software/Guestar/