BetterDesktopTool!

Dexpot turns your monitor into up to 20. It creates and manages virtual desktops and enables you to work far more efficiently and comfortably with many simultaneously opened windows on Windows 95/98/ME and NT4/2000/XP/2003/Vista (incl. x64).

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

Command-Tab Plus Is a Powerful and Customizable macOS App’s and Windows SwitcherCommand-Tab Plus is designed to help you switch between apps and windows in a faster and more convenient way. A great alternative for Mac App’s switcher.

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.

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.

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

Manico is a fast application switcher for Mac that lets you access apps by simply holding the Option key and pressing the target number.

LiteSwitch X follows the tradition of LiteSwitch as a simple solution for managing open applications using the keyboard. Like its predecessor which will continue to be available, LiteSwitch X has a clean, simple and functional style that has become Proteron's hallmark. It features an aquified transparent, resizeable window which is invoked by a configurable key-combination (default is Apple-Tab). From the pop-up window the user can switch to any application, hide, quit, or force quit any application or drag-and-drop files onto any application. Windows users migrating to the Mac can feel more at home having the Alt-tab functionality returned to them, yet enjoy it in its full Mac OS X splendor. »

With SpaceLauncher for macOS, you can launch or switch to an app by pressing a pre-defined key while holding down spacebar.