monitor mailboxes and/or newsgroups

xbuffy

monitor mailboxes and/or newsgroups

Xbuffy is a program that displays how many unread mails you have in your different mailboxes. You can have different titles for the mailboxes, and define what shall happen when a new mail arrives. It can beep and invoke a shell command, for example.
monitor changes to (configuration) files

changetrack

monitor changes to (configuration) files

changetrack automatically monitors changes to a set of files. If the files are modified one day and the machine stops working correctly some days later, changetrack will provide information on which files were modified and thus help locate the problem.
remote-control dockapp for XMMS2

wmxmms2

remote-control dockapp for XMMS2

wmxmms2 is a dockapp for WindowMaker and other window managers that support dockable applets. It acts as a remote control for the XMMS2 media player.
automated package list synchronization

pkgsync

automated package list synchronization

pkgsync is a tool for keeping multiple machines reasonably similar and clean. Packages can either be in a `must be installed', `may be installed' or `must not be installed' list (which is presumed to be distributed separately using a tool such as rdist or cfengine). pkgsync will take care of meeting the demands put down in the lists, and then removing everything that is not in the `must' or `may' list and is not necessary for their operations (as determined by aptitude).
eventstat -k (report just kernel threads)

eventstat

kernel event states monitoring tool

Eventstat periodically dumps out the current kernel event state. It keeps track of current events and outputs the change in events on each output update. The tool requires sudo to run since it needs to write to /proc/timer_stats to start and stop the event monitoring.
Interactively debug regular expressions

visual-regexp

Interactively debug regular expressions

visual-regexp helps to design, debug or more generally work with the perl regular expressions. Since it is often difficult to write the right regexp on the first attempt, this tool will show the effect of regexp on a sample that can be selected.