Visitors is a very fast web log analyzer for Linux, Windows, and other Unix-like operating systems. It takes as input a web server log file, and outputs statistics in form of different reports.

Webfwlog is a flexible web-based firewall log analyzer and reporting tool. Webfwlog supports standard system logs for linux, FreeBSD, NetBSD, Solaris, Irix, OpenBSD, OS X, etc. as well as Windows XP.

fwlogwatch is a packet filter / firewall / IDS log analyzer written by Boris Wesslowski originally for RUS-CERT. fwlogwatch supports a lot of log formats and has many analysis options.

Prelude-LML is a signature-based log analyzer monitoring your log file and received syslog messages for suspicious activity.

LightSquid is a light log analyzer for the squid proxy. LightSquid project features a small size (~45k) and a fast parser.

GWIA Log File Analyzer is a utility that allows yout to generate reports from a GroupWise email log file called ACCT.

pgFouine is a PostgreSQL log analyzer. It allows you to have a clear overview of your database activity, and can generate reports with slowest queries, most frequent queries, errors, graphs, and so on.

Throughput monitor is a log analyzer. In general notation it is a event counter per timeframe - in short frquency monitor. If it detects too high event rate, utility notifies about it.

ppplag provides a PPP log analyzer. ppplag reads system logs and shows a table of all found PPP sessions with stats for start times, durations, bytes in/out, and speed in/out.

ETTERLOG is a utility for Network Lan (SWITCH) for file .ECI and .ECP. (Ettercap program). Etterlog is the log analyzer for logfiles created by ettercap. It can handle both compressed (created with -Lc) or uncompressed logfiles.

Nuhe is a rule based log monitoring system, which is capable of action when rules are matched againsts log(s) activity. Default Nuhe mode is to run on background (daemon), but it can also be used in foreground and log analyzer mode.

ADMLogger is a log analyzing engine based on fireparse. After I had written fireparse, I had found myself writing little scripts based on it. Like one that told me what my FTP server did that day.

Wflogs is a firewall log analysis tool. It can be used to produce a log summary report in plain text, HTML and XML, or to monitor firewalling logs in real-time. This project is part of the WallFire project, but can be used independently.

NetWare Control Center is an advanced Logfile Analyzer and Realtime Event Monitor for Novell NetWare 4.x, 5.x, 6.x and Open Enterprise Servers.

mod_uid is a module issuing the "correct" cookies for counting the site visitors.

WallFire is a very general and modular firewalling application based on Netfilter or any kind of low-level framework. It will enable to manage every aspect of a firewall administration, from configuration to monitoring, intrusion detection, etc...

Open Site Builder Tools is a project that provides you with free software intended to facilitate your life as a professional web site developer. Currently available tools include: open site builder site pages assembler.

Analog is an application that will help you measure the usage on your web server.

glFlow is a (D)DoS logger written with speed in mind. glFlow detects attacks on high speed links through real-time flow aggregation and analysis. What do I run it on ? It was written on FreeBSD and tested on both FreeBSD and Linux.

Practical Query Analyzer produces HTML reports on the most frequent queries, slowest queries, queries by type (select/insert/update/delete), and more for both PostgreSQL and MySQL log files..