scanlog reads logfiles generated by CommuniGate Pro and generates parsed output in either plain text or HTML. It is no longer supported by the author, and does not work for recent versions of CGPro. If you are interested in taking over maintenance of the project, please contact the author.
qmailmrtg7 utilizes qmail and tcpserver/multilog's extensive logging capabilities to create mrtg graphs. It efficiently processes the logs (large sites with historical logs of over 100MB can be processed in a few seconds). For qmail it graphs remote/local delivery concurrency, queue size, messages process, bytes transferred, and success/failure delivery status. For tcpserver services like SMTP and POP, it graphs total connections and concurrency. For djbdns, it can graph dnscache and tinydns activity. For ClamAV, it graphs viruses found. For spamassassin it graphs spam emails found.
glogwatch is a GKrellM plugin that alllows the monitoring of an arbitrary file, such as /var/log/messages, or a SNORT alert file, for changes. Once a change is detected, a timer is displayed showing the elapsed time since the change occurred. The timer is reset and re-armed when the user clicks on the plugin to view the file.