bitsaplenty

That graph looks like it was generated by rrdtool (http://oss.oetiker.ch/rrdtool/). If you are looking for monitoring of stats like system load, disk io, etc, check out cacti (http://www.cacti.net/). It has quite a few plugins to monitor other stuff as well. It also works for remote servers via snmp.

This is not the first time and it won't be the last time. I recommend AWS's Route53. It costs a bit of money but it's worth every penny.