I have two Windows servers, an SBS 2003 and an AWS/EC2 2008R2.
I would like to set up some monitoring that will raise an alarm (send an email) if certain criteria are met. For example, CPU usage sits at 100% for more than a couple of minutes or disk space on nominated volumes falls below certain thresholds, etc.
Would the gallery please make recommendations? Open source / freeware by preference of course :)