What are some alternatives?
When comparing Eyes Of Network and DiamanteDesk, you can also consider the following products
openITCOCKPIT - openITCOCKPIT is an open source out of the box monitoring framework. It can be installed on Debian based distributions through apt and provides a user friendly web interface where you can create all your hosts and services you like to monitor.
ZenDesk - Zendesk is a beautiful, lightweight help-desk solution.
Spiceworks Help Desk - Help desk software features that work for IT
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Check_MK - Check_MK is comprehensive IT monitoring solution in the tradition of Nagios.