Spmon

SPMon is a collection of simple scripts that are meant to be plugged in various monitoring systems to query service provides for some data. For example, if you use an Internet service provider, pay for it and want to collect account balance stats on regular basis, you'd most likely want to query programmatically from your monitoring system (for example, once per day) to check that your account balance approaches critical level that would mean termination of services and thus trouble.