The JScrollDesktopPane Swing component for Java provides a virtual desktop replete with dynamic scroll bars, dynamic menus, and dynamic button shortcuts. The JScrollDesktopPane class surmounts the limitations of the original JDesktopPane Swing component, offering a solution to the clipping and overlap problems inherit to said component, and mimics the interface of the original JDesktopPane to provide an easy upgrade path. It provides a scrolling MDI desktop, one of the most requested features to the Java JDK.
PLWM (The Pointless Window Manager) is a highly modularised window manager written in Python. It has no configuration files; instead, you combine Python classes to make the perfect window manager for yourself. This is not a window manager for non-programmers. The feature list includes point-to-focus and sloppy-focus, outline move, resizing, deiconifying, views (extremely powerful workspaces), and multihead support. PLWM is controlled completely from the keyboard.