Window switch (wswitch) is a utility which enables you to bind a key to a particular application on Ubuntu. When the key is pressed, one of these three things will happen based on the current state.

1. If the application is not running, wswitch will start the application.
2. If the application is running but its window is not in focus, wswitch will bring it to focus.
3. If the application is running and its window is in focus, wswitch will iconify (minimize) it.

As a first step, install the dependencies

sudo apt-get install wmctrl xwit

The best way to do this is to make a soft link of wswitch in /usr/local/bin/

1. Navigate to the directory containing wswitch on a terminal.
2. Run the following:

   sudo ln -s $(pwd)/wswitch /usr/local/bin/wswitch

Now let's configure wswitch for your favorite application. Let's assume that your target application is Terminator.

First you need to find the WM_CLASS of your target application. The following will help you do that.

1. Start your target application.
2. Fire up a terminal (If your target application is Terminator, you are in luck).
3. Run the following: wmctrl -l -x | awk '{print $3}'. This will print a list of WM_CLASS of all the windows currently open on your desktop.
4. Identify the WM_CLASS of your target application. For Terminator, this will be terminator.Terminator.

The next step is to bind a key to wswitch.

1. Open the keyboard shortcuts settings. This is usually found in System Settings > Keyboard > Shortcuts.

2. Add a new shortcut and give it a name (like Terminator).

3. In the command section write the following:

   wswitch <WM_CLASS> <launch_command>

   Here WM_CLASS is what you found in the previous step. The launch_command is the command which can be used to launch a new instance of the application.

   For example, for Terminator, the following can be used:

   wswitch terminator.Terminator terminator

   You can also pass arguments in the launch_command. For example,

   wswitch terminator.Terminator "terminator --layout=my-custom-layout"

4. Bind your favorite key to this shortcut.

5. Hit the key and see the magic!

Create an issue or code it up and send a pull request.