Cloudkick which is part of RackSpace provides Agent based monitoring for external servers and cloud servers. Other than monitoring computer resources such as CPU, memory, HDD utilization. It is able to cater for customed check which is known as customed plugin. In other words, Cloudkick offers limitless way of administrator to monitor their IT assets as host level which is limited to the operating systems shell scripting support as well as limited to the creativity of the scripters.