Is there an app that creates a system-wide audio equalizer? I like using iTunes' equalizer, but that only works in iTunes.

I'm looking for some software that lets me apply a global, system-wide equalizer to Mac OS X.
The app (or pref pane, etc.) would let me change EQ settings and have that apply to all apps (iTunes, Spotify, Chrome, etc.).

Ideally the software would have some nice presets like iTunes does.

Free preferred, but I'm certainly willing to consider buying something.
I didn't want to pay to have an equalizer so I developed my own one and giving it away for free! Click  here to download eqMac!
The app is signed by Apple and works for OSX 10.9 and higher!