GKrellM is a single process stack of system monitors which supports applying themes to match its appearance to your window manager, Gtk, or any other theme. Monitor your computer with this utility.

1. No local mail support (Windows has no concept of local mail)
2. Hardware sensors are read using external tools. Supported tools are: * SpeedFan (recommended) * CoreTemp (since GKrellM 2.3.2) * MBM (outdated and not recommended anymore)
3. Windows has no concept of system load (i.e. "proc"), therefore the system load value is calculated by GKrellM itself. This calculation is rather inaccurate compared to the system load value determined by Unix systems.
4. Swap activity cannot be determined in a reliable way on windows, therefore the swap activity graph is non-functional

Starting applications from GKrellM (i.e. mail reade) is a bit more complicated on Windows compared to Unix systems:
1. Enter the absolute path to the application you want to start.
2. If the path contains spaces you have to put the whole path into single quotes

GKrellM Features
1. SMP CPU, Disk, Proc, and active net interface monitors with LEDs.
2. Internet monitor that displays current and charts historical port hits.
3. Memory and swap space usage meters and a system uptime monitor.
4. File system meters show capacity/free space and can mount/umount.
5. A mbox/maildir/MH/POP3/IMAP mail monitor which can launch a mail reader or remote mail fetch program.
6. Clock/calendar and hostname display.
7. Battery laptop battery monitor.
8. CPU/motherboard temperature/fan/voltages display with warnings and alarms. Linux requires a sensor configured sysfs, lm_sensors modules or a running mbmon daemon. FreeBSD can also read the mbmon daemon. Windows requires MBM or SpeedFan.
9. Disk temperatures if there's a running hddtemp daemon.
10. Multiple monitors managed by a single process to reduce system load.
11. A timer button that can execute PPP or ISDN logon/logoff scripts.
12. Charts are autoscaling with configurable grid line resolution, or can be set to a fixed scale mode.
13. Separate colors for "in" and "out" data. The in color is used for CPU user time, disk read, forks, and net receive data. The out color is used for CPU sys time, disk write, load, and net transmit data.
14. Commands can be configured to run when monitor labels are clicked.
15. GKrellM is plugin capable so special interest monitors can be created.
16. Data can be collected from a gkrellmd server running on a remote machine.
17. Many themes are available.

The license of this software is Free, you can free download and free use this system monitor software.