Ipt_fw is a firewall for Linux based on iptables. It is designed for client systems. Ipt_fw outputs a shell script containing iptables commands, so inspection of the settings it creates is easy. The configuration files are made in LibreOffice（OpenOffice）Calc. Making of the firewall and a machine using the firewall are separated. It allows you to set the user level and features detailed logging, IP address blacklist management, and iptables integrity.
python-tracing provides the Python library "tracing" to help with logging debug messages. This module provides a couple of functions for logging debug messages. It is sometimes practical to add a lot of debugging log messages to a program, but having them enabled all the time results in very large log files. Also, logging that much takes quite a bit of time. This module provides a way to turn such debugging or tracing messages on and off, based on the filename in which they occur.
Picviz is a parallel coordinates plotter which enables easy scripting from various types of input (such as tcpdump, syslog, iptables logs, or Apache logs) to visualize your data and discover interesting results quickly. Its primary goal is to graph data in order to be able to quickly analyze problems and find correlations among variables. With security analysis in mind, the program has been designed to be very flexible, able to graph millions of events.
pypty is a tty logger aimed at heavy script(1) users who like to (or would like to start to) log everything they do on important systems. It creates one (or two, if you ask for timing data) file(s) per day. The distribution also includes "script-replay", which is somewhat like the traditional scriptreplay - that is, it's for replaying tty logs - but it does not require timing data and lets you step forward and back in the log.
SysLog Summary summarizes the contents of a log file written by syslog. It displays each unique (except for the time) line once, and also shows the number of times such a line occurs in the input. The lines are displayed in the order they occur in the input. It is also possible to define some rules to ignore certain lines by using regular expressions.