gsysinfo is a GNOME panel applet, modeled after the "xsysinfo" monitor. It displays system load, CPU usage (broken down by system/user/nice/idle), memory usage (normal/kernel cache/available), and swap space usage. Each of the gauges can be turned on or off, and the colours can be configured as desired.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.