I favor keyboard shortcuts over mouse actions so I\'m heavily using keyboard shortcuts with all kinds of applications. Every now and then I\'m running into a situation where I a
What you want may not be possible. Consider the method by which a application specific system-wide shortcuts may be implemented: event taps. An application can do whatever it wants with an event and never actually register the event with the system. Thus, no application could be written to identify every possible event!
http://www.ergonis.com/products/keycue/
It even updates its list when shortcuts are changed.
You can download a list of additional system-wide shortcuts from their site that includes keys not listed anywhere else. But it doesn't show shortcuts for continuously active applications such as Evernote.
http://www.theregister.co.uk/2009/02/24/hotkeys_framework2/
(but it still won't know about event taps)
http://support.apple.com/kb/HT1343