Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti module for HostBill enables you to measure and bill for bandwidth usage: HostBill automatically collects data from Cacti to bill for total transfer, averages or 95th percentile. Among other features the module also enables to display bandwidth graphs directly in HostBill client portal, project and warn client about bandwidth usage and choose whether graph assigned to customer account should be used for billing or for information only.
Cacti extension is also bundled for free in Colocation Manager App
