A few years ago (ok a LOT) I had written a VERY simple network monitoring system for work. It primarily gathers syslog events, and does a basic TCP connect to check on machine state. This uses MSDE as it's engine for events.
Weeble File Manager is a web based file manager / ftp client, built on php4. It allows users to Copy, Move, Rename, Upload, Download, & Edit files on an FTP server, through their web browsers.
Toolset for pam based user management. Including Java client, database scheme (postgresql), pam and nss modules for postgresql (provided by the sysauth-pgsql project ) and interfaces to the system (e.g. rules generation for a traffic shaper).