Which Nagios tray tool is better to dispaly the service alerts?

Hi All,

We are using Nagios to monitor various devices.now there are 150 devices and planning to add some more 150 devices.so it will be difficult to access.
then for automation of job I want to use Nagios tray. can anyone say which Nagios Tray is better to display the notify alerts.if possible plz provide link.

with regards,
Santosh