SysPeek is an indicator that allows Ubuntu users to keep track of their system resources such as CPU usage, hard disk usage, memory usage, swap usage, network traffic, etc. You can also use this indicator to kill running processes.
Once installed and launched, the SysPeek icon will be displayed in the notification area (top right on the upper panel). Click it to monitor your system resources.
To install SysPeek on Ubuntu 11.04/10.10/10.04, launch the terminal and issue these commands:
sudo add-apt-repository ppa:vicox/syspeek
sudo apt-get update
sudo apt-get install syspeek