The HotKeys daemon listens for the "special" hotkeys that you won't
normally use on your Internet/Multimedia keyboards. The buttons perform
their intended behaviors, such as volume up and down, mute the speaker,
or launch applications. It has On-screen display (OSD) to show the
volume, program that's being started, etc. It features an XML-based
keycode configuration file format, which makes it possible to define the
hotkeys to launch any programs you want.