Deselect text using keyboard shortcut or prevent selection of word/link on right click

See this question for different ways to assign shortcuts to opening applications.

When I tried using Alfred to assign a keyboard shortcut for MacVim, pressing the shortcut did not always open a new window. You could try using a script like this though:

tell application "MacVim"
    reopen -- open a new default window if there are no open windows
    activate -- make frontmost
end tell

Or try just using activate app "MacVim" or adding different arguments to open -a MacVim.

I don't know any way to show a context menu for items selected with the keyboard like what the menu key does in Windows.

To assign a keyboard shortcut for performing a secondary click at the current coordinates of the pointer, you can either:

• Use a private.xml like this with Karabiner:

  <?xml version="1.0"?>
  <root>
    <item>
      <name>Right Mousebutton</name>
      <identifier>rightMouseButton</identifier>
      <autogen>__KeyToKey__ KeyCode::OPTION_R, PointingButton::RIGHT</autogen>
    </item>
  </root>
  

• Use BetterTouchTool:

  

• Use Keyboard Maestro:

  

• Download MouseTools and assign a shortcut to MouseTools -rightClick.