In general we try to be similar to MS-Windows shortcuts.

Default bindings (in MATE)

Key Action
Alt + F4 Close the active item, or exit the active program
Alt + Tab Switch between open items
Ctrl + Alt + Tab Use the arrow keys to switch between open items
Alt + Esc Cycle through items in the order in which they were opened
Alt + Spacebar Open the shortcut menu for the active window

Custom bindings (Window Manager)

Key Action
Ctrl + Esc Open the Start menu
SuperKey + Up arrow Toggle Maximize the window.
SuperKey + Down arrow Remove current app from screen or minimize the desktop window.
SuperKey + Left arrow Maximize the app or desktop window to the left side of the screen.
SuperKey + Right arrow Maximize the app or desktop window to the right side of the screen.
SuperKey + D Display or hide the desktop.

This is configured using this script: keybindings.sh

Xbindkeys

Key Action
Ctrl + Shift + Esc Open Task Manager
SuperKey + L Lock your PC
SuperKey + E Open File Manager.
SuperKey + F Open search.
SuperKey + R Open the Run dialog box.
SuperKey + KP_Mult Volume Up
SuperKey + KP_Minus Volume Down
SuperKey + KP_Div Mute Toggle
SukerKey + KP_Add Switch PA output

This makes use of this xbindkeysrc file.

TODO: SuperKey + V Open the clipboard.