Esprad is a radius' logs analysis tool. It consists of some perl scripts which read the radius' logs data, data which previously has been inserted in a MySQL database.
Shadow Watcher is a Peer to Peer log sharing tool for the security analyst. Consider it a "community watch" program which allows you to keep your system secure from the threats on the internet and help others do the same.
Probe is a website-usage analysis tool. It 'probes' (logs) certain pages being viewed by a visitor, without needing access to log-files from the web-server and produces a web-page with statistics using bargraphs.
A simple yet useful tool for browsing instant messenger log files (like Trillian, ICQ or Gaim) and also HTML server log files.
It has some interesting search modes and provides functionality that most messengers don't.
A tool to extract the information in any log file into a database. It has no inherent knowledge of particular log formats but by using inbuilt rules and asking a few simple questions should be able to parse any type of text log intelligently.