Skippy is a window management tool for X11 similar to Mac OS X's Exposé feature.

Skippy (and Skippy-XD) usually needs to be compiled and installed from source, although binaries exist for some platforms (e.g., Ubuntu).

The user can next choose a window with either the keyboard (by using the up, down, left and right keys) or the mouse and activate it by pressing the left mouse button or the return or spacebar key.

There are also two or three modifiers you can use with the hotkey: hold Control and Skippy (not used in Skippy-XD) will update the snapshots of all the windows.

Projects with similar features are Komposé (an Exposé clone for KDE3) and Compiz, the latter containing built-in Exposé-style functionality which can be activated by pressing F12.