• gplv1

Check SNMP Cisco Traffic

• gplv2+

check_file_pass - linux

• Cacti
• other

Check Users Plugin for Nagios and Cacti

• gplv2

VMWare ESX guest status checks

• gplv3

check_fsc_blade_health

• HIDS
• IDS
• OSSEC
• other

Ossec Alert Mail check

• gplv3

check_cisco_ping_ssh

• gplv2

check_pop3_subject

• other

Netapp check disk usage

• gplv2

check_ssl_cert_alternative