Cacti - http://www.cacti.net/

Exported Graphs

Tree: Default Tree
Leaf: Hex - Associated Graphs
hex - CPU Usage hex - Load Average hex - Jobs hex - CPU hours active
hex - Memory Usage hex - Free memory hex - cores and efficiency hex - Disk Space - /
hex - home hex - fhgfs hex - Traffic - eth0 hex - Traffic - eth1
hex - Users logged in