» AWStats    A web server logfile analyzer that works as a CGI and/or from command line, and supports multiple languages. (Perl)    http://awstats.sourceforge.net/

» Anteater    A log analyser for MTA logfiles (for example sendmail). (C++) [GNU/Linux, Unix]    http://anteater.drzoom.ch/

» Calamaris    Parses the logfiles of a wide variety of Web proxy servers and generates reports. (Perl) [Linux, Unix]    http://cord.de/tools/squid/calamaris/Welcome.html

» CoCaLoRes    Resolves IP numbers to hostnames like in Apache, Squid, or other logfiles. It is able to cache lookups in a file. (Perl)    http://cocalores.sourceforge.net/

» Fast Track Systems Monitor    A general purpose monitoring engine for use by home users and system administrators (Perl) [Unix, Win32]    http://ftmon.sourceforge.net

» Fireparse    Emails a report of all packets that have been logged by the kernel's ipchains or iptables packet filtering subsystems. (Perl) [GNU/Linux]    http://freshmeat.net/projects/fireparse/

» Htmlobserver    Web page checker based on regular expressions. (Java) [Linux, Windows]    http://home.arcor.de/hirnstrom/htmlobserver/index.html

» Iperf    A tool to measure the maximum TCP bandwidth between two points on the internet. (C++) [Many platforms]    http://dast.nlanr.net/Projects/Iperf/

» NISCA    A network interface traffic statistics reporting and graphing tool. (PHP)    http://nisca.sourceforge.net/

» NetSaint    An active network monitor with plugins to monitor several types of services, e.g. ftp, http, tcp port, disk space. (C) [GNU/Linux, Unix]    http://www.netsaint.org/

» Netload-Applet    A network load monitoring applet for GNOME. (C) [GNU/Linux, FreeBSD]    http://netload-applet.sourceforge.net/

» Network Grep    Ngrep is a pcap-aware tool that will allow you to specify extended regular expressions to match against data part of packets on the network. (C) [GNU/Linux, BSD, Windows 95/98/2000]    http://ngrep.sourceforge.net/

» Ntop    A tool that shows the network usage. It can be used interactively, or in web mode. (C) [GNU/Linux, Unix, Windows]    http://www.ntop.org/ntop.html

» Osmius    Allows the monitoring of heterogeneous systems using multi-platform agents distributed over a network. Includes news, downloads and a development weblog.    http://www.osmius.net

» RackView    Assists in visualizing a Data Center's computer rack layouts by creating a web page with HTML tables to show a frontview of the racks. Included are brief commandline and CGI scripts to demonstrate its implementation. (Perl) [Linux]    http://rackview.sourceforge.net

» Zabbix    Software for application and network monitoring - logging, monitoring, capacity planning, availability and performance measurement, and helpdesk information. (C, PHP) [POSIX]    http://www.zabbix.com/

» squidefender    Perl script which parses for attacks a squid log file. Allows to run commands or automatically notify the attacker's ISP upon trigger.    http://www.jeroen.se/squidefender.php