Although to be honest the application is at its early stage yet it's quite cool and somewhat useful :/. Like many others, it also has an indicator icon which changes its colors and "levels" according to your CPU usage.
I sometimes find this quite useful. Because unless you have a bit loud Laptop or quite familiar with your PC, it can be quite difficult to notice those buggy applications that consume unnecessary amounts of CPU usages (you know, you can guess these from the noise from your CPU Fan, sometimes).
In those cases, applications such as SysPeek can be very handy since you don't even have to launch or move your mouse over it... just have a quick look at its icon and you know whether you're in trouble or not :P.
|Yo!, mayday mayday.... "oh man, not again! :)..."|
*. When you click on the icon it'll reveal a CPU usage meter at the top (below screenshot).
*. Memory usage/RAM.
*. Swap usage - Virtual memory.
*. Disk usage analyzer.
*. Network receive/sent data and you can even launch the Gnome's built in System Monitor through it... although I'm not entirely sure but SysPeek can be an applet that "extracts" those information from that System Monitor and displays in its own screen as well.
Anyhow, you can install SysPeek in Ubuntu 11.04 Natty Narwhal by using the below commands.
sudo add-apt-repository ppa:vicox/syspeekOnce install, press "Alt" + "F2" keys on your Keyboard and enter the below command into the box and it'll appear within your notification area, hopefully (just kidding, it works).
sudo apt-get update
sudo apt-get install syspeek