JLogTailer is a free and open source program that allows the viewing of any log file entries in real time.
For example, you can fire up JLogTailer, point it at your server`s log file and will display new lines that are added to it in real time.
This is particularly useful if you want to tinker around with stuff and need to see what`s going into the end of your log files there and then, without having to faff about with the command line. More than one log file can be `tailed` if desired.