Free software to monitor email software for linux

Hardware Monitor is a multi-purpose, beautiful system-monitoring applet.
The Hardware Monitor applet is an applet for the GNOME panel which tries to be a beautiful all-around solution to system monitoring. It also strives to be user-friendly and generally nice and sensible, integrating pleasantly with the rest of your GNOME desktop.
Includes different viewers, including a flame effect, allows multiple devices to be monitored in the samme applet, uses smooth updating, polished graphs, clean HIG-compliant interface.
Main features:
- A graphical view where each monitor is represented by a (time, measurement) colored curve
- A bar-plot view with a horizontal bar per monitor
- A column view with a column (time, measurement) diagram for each monitor
- A textual view which simply lists the monitors and the currently measured values
- A flame view which produces spiffy flames, the sizes of which are determined by the values of the monitored device
And the applet supports monitoring the following hardware characteristics:
- CPU usage (all CPUs, or one at the time) - niced background processes such as SETI@home are automatically ignored
- Memory usage - cache and buffers are automatically ignored
- Swap usage
- Load average
- Disk usage (or disk space free)
- Network throughput (Ethernet, wireless, modem, serial link), either incoming or outgoing or both
- Temperatures from internal sensors (e.g. system board and CPU temperatures)
- Fan speeds from internal sensors

Hardware Monitor applet is a small program for the Gnome panel which tries to be a beautiful all-round solution to hardware monitoring.
It also tries to be user-friendly and generally nice and sensible, integrating pleasantly with the rest of your Gnome desktop.
Main features:
- A graphical view where each monitor is represented by a (time, measurement) colored curve
- A bar-plot view with a horizontal bar per monitor
- A column view with a column (time, measurement) diagram for each monitor
- A textual view which simply lists the monitors and the currently measured values
- A flame view which produces spiffy flames, the sizes of which are determined by the values of the monitored device
And the applet supports monitoring the following hardware characteristics:
- CPU usage (all CPUs, or one at the time) - niced background processes such as SETI@home are automatically ignored
- Memory usage - cache and buffers are automatically ignored
- Swap usage
- Load average
- Disk usage (or disk space free)
- Network throughput (Ethernet, wireless, modem, serial link), either incoming or outgoing or both
- Temperatures from internal sensors (e.g. system board and CPU temperatures)
- Fan speeds from internal sensors
- To avoid eating CPU time when it is scarce, the applet lowers its priority.

Orange Monitor is a system monitoring theme for SuperKaramba.
Main features:
- CPU Load and Temperature (mbmon)
- Used RAM
- Used Space on hda and hda2 (customizable)
- Bandwidth Spent (bars are customizable , Incoming gets full @ 1GB and Outgoing @ 256MB by default)
- XMMS Controls (xmmsctrl)
Inspired on:
- Yaxay Skin for Winamp3
- Pod Icons for LiquidWeather karamba
- SystemTux Karamba

NAT Monitor is a tool to monitor hosts bandwidth usage in a Linux-NAT network.

A daemon collects data and clients display them (currently a GTK app with graph and a text version). It detects new hosts, saves up to 12 hours of data, and has a nice summary statistic.

Sleek Monitor is a combination of basic monitors for:
- OS
- KDE
- Kernel
- CPU & cache
- GPU & GPU Temp
- Memory
- Wired & Wireless networks
- battery with time
- date and calendar

Aazmat Monitor is a SuperKaramba system monitoring widget.

It was adapted to meet office theme and added a few new monitors all of them are built into there own theme file so you can place them were you like.

Camera Monitor is a little tray system icon that notifies you when your Webcam is on. The project is designed for the GNOME desktop, but will work as well on KDE and XFCE.
Camera Monitor is released under the terms of the GNU General Public License.
Installation:
tar xzf laptoptemp-0.2.tar.gz
cd cameramonitor-0.1
./configure
sudo make install
Enhancements:
- Added support for libnotify
- Ported to new gtk.StatusIcon
- Updated preferences panel
- Updated about information
- Removed notification on bad previous exit
- Added option to preferences for autostarting cameramonitor every session

Shell SYStem Monitor a basic console ncurses application for system monitoring.
Shell SYStem Monitor will show things like CPU load, memory load, uptime, Ethernet load (bandwidth usage in KB/s), server time, and more.
Install code:
# cd ssysm
# make
(as root)
# make install
Uninstall code:
(as root)
# make uninstall
Enhancements:
- There was a bug which occurred when outgoing bandwidth exceeds 2GiB, in which the TX bandwidth stays at 0 and TX byte counter sticks to 2GiB.
- This has finally been fixed. However, the byte count still resets to 0 when the interface exceeds 4GiB.