single window

control your computer's volume using a slider on a small window

Checkbook Ease 2.1 Freeware checkbook/budget,beautiful window with 20 colors.

Automatically hide a window's buttons and other controls.

Move a window without activating it.

Automatically control how to display a window.

WindowWatch will let you instantly resize a window to any standard.

Dropcloth is a simple application that overlays a solid colored window

It displays a magnified portion of your screen in a separate window.

a free implementation of the X Window System.

Automatically grab window title and web URL.