Need groupware that doesn't require tedious installation and configuration, and is ready for use in a matter of minutes? Lucane can be deployed in no time, and is so simple to use that you don't need to spend hours learning it. Lucane has a modular architecture and includes an impressive range of pre-made modules, including a multi-user calendar, an email client, instant messaging, a white board, forums, notes, shared folders, and an RSS reader. Users can easily add and remove modules to customise their groupware environment, and developers can create additional modules and plug them in Lucane.

Nagios® is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. It has been designed to run under the Linux operating system, but works fine under most *NIX variants as well. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.

RedWall is a bootable CD-ROM Firewall based on RedHat 9.0. It's goal is to provide a feature rich firewall solution, with the main goal, to provide a webinterface for all the logfiles generated! Configuration is currenty stored on a floppy/USB Memory Stick/Harddrive or sent by email.
Main features are:

Firewalling (Iptables, Shorewall)
VPN (Openswan, Openvpn)
Intrusion Detection (Snort, Snortcenter, Snortsam)