Possible Cloud Monitoring Tools | IT Management and Cloud Blog

Possible Cloud Monitoring Tools | IT Management and Cloud Blog: "Nagios
Most prevalent open source monitoring product.
Hyperic
At this point they are leading the pack with the most work done with (Amazon, Rackspace, and Mosso).
Zenoss
Not many cloud stories yet. Very sound monitoring tool.
Zabbix
I have used this product before and it is a solid tool. I am not sure if it’s a good play in the clouds. However it is written in C and might be better suited for performance (ala clouds).
OpenNMS
I need to research.
Ganglia
Very prevalent in the grid space. Might make a great candidate for cloud monitoring.
Collectd
Rightscale uses it as their monitoring tool. They seem to be making all the right moves, who am I to argue.
Ntop
Written in C. Might be a good tool for the cloud.
Monit
Needs research
Gkrellm
Needs research"