Loadmeter is a system monitoring utility that keeps track of various system stats, including Load Average, Uptime, Disk Usage and Memory Usage.
In default mode Loadmeter displays colored graph with load average of last minute. The red line shows the maximum load average since started and the blue line shows five minute load average. This is not necessarily a replacement for top or htop, but does a decent job at tracking the load average of your system.
For download and more information, check out the author’s website: http://www.cactii.net/~bb/linux/