Zabbix

Awesome

Great stuff

A real enterprise class open source product. Rich of features, well documented and widespread around the world.

I came from Nagios, and I think Zabbix is better.

It's pretty great, not a ton of templates but if you have the time and know how it is right up there with whatsup, solarwinds, etc. You can drop a JPG map in for a background, create a global map showing your datacenters.....your office with the printers....detailed rack layout. Custom groups, monitoring, alerts...SMS, jabbers, premium services. The agent does not require a reboot, it works with Active Directory authentication, there is a trick on getting it to work...but it's easy breezy after that. The inventory is pretty awesome It can keep track of all of your even logs so you can keep them small on the hosts....and memorialize them in Zabbix. It can monitor a website and can actually log in and browse pages for a valid response, aka, user experience instead of is IIS or apache running?