The following settings disable default launcher of Unity

Install compiz plugins:

sudo apt-get install compizconfig-settings-manager
sudo apt-get install compiz-plugins

Open compizconfig-settings-manager

Click switcher:

  1. disable alt tab key binding
  2. disable shit alt tab key binding

Click Window management:

  1. Enable “Static Application Switcher”
  2. resolve conflicts
  3. set all anyway
  4. Click switcher
    1. set alt-tab to next window (all windows)
    2. set shift-alt-tab to previous window (all windows)