1)   CubeDesktop 1.2
CubeDesktop creates six virtual and independent desktops, increasing the space you have to work and play. Use our stunning 3D technology to quickly show, switch and move windows between desktops.

 2)   AltSwitch 1.1
AltSwitch is an advanced replacement for the standard Windows Alt-Tab task switcher. AltSwitch lets easily navigate between tasks running on your computer. For each task small preview image is displayed. Skins are supported.

 3)   WinGlance 1.2.8
WinGlance is a visualizable ALT-TAB replacement task switching utility. It lets XP users switch from one open window to another, with only a click at the full-screen neatly-arranged window-snapshot list activated by Alt-Tab or mouse gesture.

 4)   Mouse Gesture Task Switcher (mgSwitch) 1.1.5.B317
Draw a symbol or a letter shape to switch between windows.mgSwitch is an advanced task switcher. It helps you switch between windows faster and easier by using the mouse gesture (Drawing a symbol or a letter shape anywhere on the screen).