The Media Key Binder lets you assign a key combination to play/pause whichever desktop program is running. (Spotify, Windows Media Player, iTunes, etc...)
This is useful if you switch computers or laptops (probably at work) and keep forgetting where the play/pause key is on that machine.

Instructions
Just click the lock.
Select your modifier keys (Ctrl, Alt, Shift)
And push your key.
Your key is set. Happy Listening!

Screen Grabber lets you do a couple things.

The Audio switcher lets you switch audio devices with a click.
If you only have two devices (Headphones and Speakers), a double click will swap the default one.