KBiff is a KDE "biff" or new mail notification utility. It is highly configurable but very easy to use and setup. It supports session managment (it "remembers" the last state it was in before you logged off) and can be docked into the panel. It has support for mbox (Unix-style), maildir (qmail-style), mh, POP3, IMAP4, and NNTP mailboxes.
Rain's PPP scripts simplify the use and setup of pppd. Features include connection time logging, a ppp-off that works right with more than one pppd running, dial-on-demand support for pppd 2.3.x., and more. Another interesting feature is that the scripts keep track of your connect speed and time, and included is an mirc script to show connection status from a remote machine, as well as a shell script that works for *IX boxes.
Moodss is a modular monitoring application, which supports operating systems (Linux, UNIX, Windows, etc.), databases (MySQL, Oracle, PostgreSQL, DB2, ODBC, etc.), networking (SNMP, Apache, etc.), and any device or process for which a module can be developed (in Tcl, Python, Perl, Java, and C). An intuitive GUI with full drag'n'drop support allows the construction of dashboards with graphs, pie charts, etc., while the thresholds functionality includes emails and user defined scripts. Monitored data can be archived in a SQL database by both the GUI and the companion daemon, so that complete history over time can be made available from Web pages or common spreadsheet software. It can even be used for future behavior prediction or capacity planning, from the included predictor tool, based on powerful statistical methods and artificial neural networks.
Tkchooser is a Tk-based front end to Appletalk and SMB networks. It sits on top of Netatalk and Samba, providing a Macintosh chooser-like GUI to the command line tools. Tkchooser is designed around a modular architecture which allows extension by plugins. Also included is a GUI to GNU enscript as a plugin or standalone program. Tkchooser lets you mount shared volumes, print to network printers, and other fun stuff.
LCDproc is a utility to drive one or more LCD (and LCD-like) devices attached to a host. It is comprised of a server, which uses a modular device driver system to control attached displays, and one or more clients to gather data as appropriate and send screen data to the server. The included client displays a multitude of system statistics (CPU/memory/disk usage, uptime, date and time, temperature, etc.). Multiple clients can connect to the server simultaneously, and clients can set priorities on the screens they provide to influence in what order items are displayed. This facility can also be used to "pop" critical screens (such as an entry from syslog from a log-watching client). All functionality is implemented in userland. Support for many display devices and several platforms (Linux, *BSD, and Solaris at least) is included.
mon is a tool for monitoring the availability of services and sending alerts on prescribed events. Services are defined as anything tested by a "monitor" program, which can be something as simple as pinging a system, or as complex as analyzing the results of an application-level transaction. Alerts are actions such as sending email, making submissions to ticketing systems, or triggering resource fail-over in a high-availability cluster.