nsc is a curses-based tty/console monitor for Nagios v1/v2. It allows you to monitor Nagios services without the expense or availability of a GUI and features a full-screen realtime colourized display of Nagios service status.
Monfarm system monitors availability of serverfarms. It generates dynamic html pages showing the current status of a group of servers with similar configuration. Alarms are generated in case of unavailability (smtp, network).