Network Monitoring with Nagios: This month you'll learn how to keep your systems healthy with Nagios, a free and easily extensible network monitoring tool. We'll show you how to use Nagios to watch for potential problems, display reports in a graph or HTML-based table, and send you an alert if problems arise.

Ruby and Glade: Learn how to create an example screenshot application with the powerful combination of the Ruby language and the Glade interface development system.

Mindquarry: This easy-to-use, open source collaboration system can help small workgroups with file sharing, task management, and wiki editing.