Background
The iiNet Usage Analyser (iiUsage) was originally designed and coded by Tim Hall.

In late 2003, Martin took Tim's source code, did a major clean-up of the code (including a rewrite of large parts of the code), and added some more functionality and enhancements.

Martin also enhanced it to support iiNet's new monthly anniversary quota calculations, which were implemented on 12 January 2004, replacing their rolling 30 day quotas, and has continued to add new features.

Features
The iiNet Usage Analyser is a system tray application, with the following features:
supports iiNet, OzEmail and iHug iibroadband2 accounts
periodically retrieves usage information from volume usage page
displays daily usage for current month in a grid
displays daily usage for current month graphically
also displays:
peak shaping status
offpeak shaping status
total peak usage
total offpeak usage
average peak per day
average offpeak per day
peak quota remaining
offpeak quota remaining
average peak per day remaining
average offpeak per day remaining
current IP address
last connection time
monthly anniversary date
automatic (timed) and manual update
quick links to various iiNet/OzEmail/iHug webpages, including Network Status, Volume Usage, webmail, etc
integration with samurize via XML data export
support for multiple iiNet/OzEmail/iHug user accounts
automatic checking for updated software versions
export to XML and CSV
historisation of usage data into a (SQLite) database
and more...


http://martybugs.net/software/iiUsage/