Block Ctrl-Alt-Delete in Windows 2000, Windows XP and Vista... (who said that it could not be done?) KeyTrap is a programmer's tool for Microsoft Windows (any Win32 version) that allows you to trap key presses (any key) and optionally block them.
Advanced Network Monitor, it allows you to monitor your net in few clicks. Extremely easy to use and very fast in discovering your network's active nodes. Full of relevant features such as: auto-detect of network configuration, monitoring, reportin..