dualscreen-mouse-utils is a set of two useful utilities for dual screen setups (e.g. :0.0 and :0.1). mouse-switchscreen switches the cursor between X screens and remembers the last used position. mouse-wrapscreen wraps the mouse cursor from one screen to the other on the specified edge, even when the screens are configured to be apart and would normally be uncrossable.
Xgone locks the screen until the current user's password is entered. While waiting, it displays a message telling where the person went and when they started the program. It moves this text around the screen to avoid burning it in at a particular location on the monitor.