Statistics and log analyzers
These are tools to analyze SpamAssassin logs and generate reports. Generally, they take syslog data logged by the 'spamd' server as input.
[http://logreport.org/lire/or/email.php logreport.org] apparently has a syslog analyzer that can grok SpamAssassin logs:
[http://mailgraph.schweikert.ch/ mailgraph]: Generates graphs from syslogs. [http://www.stat.ee.ethz.ch/mailgraph.cgi demo] available.
[http://mailscannermrtg.sourceforge.net/mailscanner-mrtg/ mailscanner-mrtg] – [http://mailscannermrtg.sourceforge.net/mailscanner-mrtg/ demo] available
[http://mailwatch.sourceforge.net/ mailwatch] – no demo, but the previous link has screenshots
[http://www.monkeynoodle.org/comp/tools/spam monkeynoodle.org] spamassassin MRTG scripts: Scans the maillog/syslog and feeds the SA results into a format from which MRTG is used to create graphs. [http://www.monkeynoodle.org/mrtg/felix.html demo] available
[http://munin.sf.net/ munin]: Munin is a tool for graphing all sorts of information about one or more servers and displaying it in a web interface. It uses the excellent RRDTool (written by Tobi Oetiker) and is written in Perl. [http://www.linpro.no/projects/munin/example/ilmari.org/marvin.home.ilmari.org-spamstats.html demo] available
[http://www.inter7.com/mrtg.html qmailmrtg] – [http://www.sk-branik.si/qmailmrtg example] available
[http://www.rulesemporium.com/programs/sa-stats.txt sa-stats.pl (Dallas Engelken's version)] : Generates a report in text or HTML from a spamd log file or from syslog. not to be confused with the "sa-stats.pl" in the SpamAssassin distribution; it's entirely different
[http://nossie.addicts.nl/projects/sa-exim-stats/ sa-exim-stats] : Generates rrdtool graphs from sa-exim log files.
[http://www.ini.ethz.ch/~stephan/software/spamdstats.tar.bz2 spamdstats]: Continuously parses spamd's log file in the background and stores various data in one Berkely DB file to be read by a second script.
[http://www.while.homeunix.net/mailstats/ vispan] – [http://hosting.boys-brigade.org.uk/mrtg demo] available
[http://www.agrav.net/software sa-daily-report]: Generates and mails a report of all the email quarantined as spam the previous day, to allow checking for false positives.
[http://ryanlee.org/software/mozilla/thunderbird/spamness/ spamness]: An extension for [http://www.mozilla.com/en-US/thunderbird/2.0.0.0/releasenotes/ Mozilla Thunderbird 2.0] that gives visual feedback on each message's SpamAssassin score. Screenshots available.
If you plan to parse spamd's syslog output, some helpful notes can be found at SpamdSyslogFormat.