Hi,
I'm looking for suggestions for a (preferably free, or cheap) software package that will keep track of customers usage in GB/mo. We currently use an obscure program called IPTrack that does 90% of what we want. What we are missing is the ability to automatically email customers when their usage gets to X% of their allowable total for the month, and the ability to allow customers to easily log in and check their own usage at any time.

Can anyone help?

Thanks,
Jon.