Master/node to gather and graph "everything" on your systems using Tobi Oetiker's rrdtool. It can optionally warn your surveillance software. This software package was originally called LRRD. The project. Please see http://munin-monitoring.org/
command line tool to manage email (alias-)domains/accounts/aliases …
vmm is the easy to use and configurable command line tool for administrators and postmasters, to manage domains, alias-domains, accounts and relocated mail users. It allows the fast and easy management of mail servers.
vmm is written in Python. It's designed for installations using Dovecot and Postfix with a PostgreSQL backend.
managerComp is an application used to monitor and manage Ice components (http://www.zeroc.com) under GNU/Linux environments. It displays the components, their states and dependences using a graph view.