WHAT (Window Hotkey Activator Tool) is a portable tool that allows you to assign hotkeys to activate/focus windows easily.
This tool permits the user to assign a hotkey to a specific window. You can enter ten entries (windows) on which to assign your custom hotkeys.
WHAT (Window Hotkey Activator Tool) interface is simple and includes the following criteria: process name, window title, and window class. You will need to play around a bit to get specific windows to activate. And there will be some cases that your attempt may not work. You are not required to use all three criterion for any given hotkey. You have the option to assign the same hotkey to multiple entries. This fact makes it possible to activate all the windows in top-down order or change it to suit your needs.
WHAT (Window Hotkey Activator Tool) is pretty simple to navigate and does provide many possibilities for key combinations making it pretty well rounded.