Liu logchecker
Download
Eventually I might make a proper release of logchecker, but for now you'll have to get it with git as described below.
Git repository
Install git and run the command below to get Liu logchecker:
git clone git://git.lysator.liu.se/liu-logchecker/liu-logchecker.git liu-logchecker
What?
Liu logchecker examines the logs that accumulate on your log server and sends email to your administrators about the interesting messages.