HostingAccelerator Bandwidth Monitoring Service lets you monitor  web, mail, ftp data transfer for each Reseller / SiteAdmin. Hosting companies can use this information to bill its customers for overage bandwidth charges.  Disk Quota Reports calculates web / ftp / mail / database  disk space usage for each site & reseller if a particular reach its quota the alert manager send user-defined alerts to end-users / resellers / hosting companies respectively.