Uses very simple state tracking to create mode-specific hotkeys.
Requires a running instance of Everything Search by voidtools to leverage the built in device independent app launcher.
Hit F1 to show the launcher. A menu will popup with options for modes.
To exit the current mode and return to the launcher hit Ctrl-Alt-F1.
You can also extend the system to make the modes auto switch based on the active window fairly straight forwardly.