Graflo is a fully compatible replacement for Nagios offering full support for Nagios plugins and various enhancements. The enhancements are meant to bring Nagios like simplicity to more modern monitoring tools such as Zenoss, Zabbix, OpenNMS, etc. Which offer better features with more configuration complexity. Graflo solves this.
Graflo also provides:
Graflo is currently in beta. Please check back soon for an update