Winflip!

VistaSwitcher is an elegant and powerful task management utility for Windows OS. Once installed, it replaces the default Windows Alt-Tab dialog with a nice box that shows a list of all running tasks, with their names and preview snapshots, and enables the user to take actions on them using the mouse and keyboard shortcuts. With just one click, you can switch tasks, minimize, maximize, restore the main window, or close the process.

HyperSwitch provides a compelling alternative to HyperDock for keyboard junkies.What's NewVersion 0.2.365-dev:

Adds eye-candy effects to windows (and start menu) like deformations (e.g: jelly windows - that makes moved window wiggle like being made from jelly; or fold - which hides windows by folding up horizontally, and unfolds when showing), physics (e.g.: keep momentum - making window to conserve move momentum; or bounce - that makes windows bounce upon receving focus ) and other SFX (e.g.: pixie dust - which makes moved window to leave a trail of twinkling pixie dust; or close puff - which displays puff cloud below cursor when closing window). »

Mission Control, formerly Exposé, is a feature of the OS X operating system.

KWin is a window manager for the X Window System, and is in the process of becoming a Wayland compositor. It is an integral part, and the default window manager of the Plasma Workspaces, but it can also be used on its own or with other desktop environments.

Inspired by Jef Raskin, our zoomable user interface shows you all the stuff on your computer on a single surface. Using zoom and pan to view, arrange and open documents feels so right. In minutes you’ll appreciate the simplicity and intelligence of our answer to the traditional desktop. Take a spin and see for yourself.30-day trial available, $24.99 to buy.

Emcee gives you a better way: one customizable keystroke or hot-corner gesture, or a tap on an icon brings up live thumbnail views of all your apps, both desktop and Windows Store, in one convenient, easy to manage view.

SmartTab, the better Alt-Tab (a Windows Alt-Tab Dialog replacement).

The ultimate desktop organizer. DeskPose NXT helps you to find your applications fast, organize your desktop and become more productive.

Sawfish is an extensible window manager using a Lisp-based scripting language. Its policy is very minimal compared to most window managers. Its aim is simply to manage windows in the most flexible and attractive manner possible. All high-level WM functions are implemented in Lisp for future extensibility or redefinition.

TopDesk radically reduces the time you spend switching between tasks by giving you the ability to quickly find the window you want from a thumbnail view.

If you are not familiar with the Alt-Tab task switcher in Windows, its a keyboard short-cut (hot-key) to enable fast switching between applications/windows. This feature has been in Windows since Windows 3.0 and is largely unchanged since Windows 95! Alt-Tab Thingy is a replacement to add brand new features to help you switch tasks faster and more efficiently than ever before!