VSCode

Keyboard Shortcuts (keybindings.json):

// Place your key bindings in this file to override the defaultsauto[]
[
  {
    "key": "ctrl+k ctrl+u",
    "command": "editor.action.transformToUppercase"
  },
  {
    "key": "ctrl+k ctrl+k",
    "command": "workbench.action.terminal.runSelectedText"
  },
  {
    "key": "ctrl+k ctrl+l",
    "command": "editor.action.transformToLowercase"
  }
]