Nagios

http://www.nagios.org/projects/nagiosconfigtools

Related

Host discovery

scan2nag

java -jar ScanToNag-0.2.jar  --range 172.16.0.0/16 --range 172.16.0.0/16 --emit-templates --timeout 50 --contacts blueit-admins --hosts-file hosts.conf --services-file services.conf --skip-reserved

nmap2nag

https://www.monitoringexchange.org/inventory/Utilities/AddOn-Projects/Configuration/nmap2nagios-ng

nmap -sS -O -oX subnet.xml 192.168.1.*
./nmap2nagios-ng.pl -i -d -r subnet.xml -o newhosts.cfg