transitiv-nagios-plugins is a collection of useful plugins for Nagios/Icinga, including command definitions, tests, and PNP4Nagios graph templates. All plugins are designed to be resilient and provide well formatted and predictable output.
pasvnag_lite is a (passive) Nagios checker. It runs Nagios (or Icinga), checks on defined objects, and submits the results to a specified NSCA host.
check_tl_health is a universal plugin which is used to monitor tape libraries.
AIX/iSeries free performance monitoring and capacity planning.
A program to create bitmaps from simple ASCII diagrams.