KmTail is a KDE version of the venerable Ktail program. It has pretty much
the same features and allows you to monitor various log files. Note that most
files in /var/log are only root-readable so you will have to start KmTail with
kdesu or, much better, configure syslog-ng to use more convenient permissions.
Log files are added via the File menu as usual or may
be dragged from a file manager. Tabs may be reordered by dragging them around.