To speed up my compyuter use I'm trying to use as many hotkeys as possible. But because I'm working in many applications it is really hard to remember all those shortcuts.

I'm looking for a program that looks at what application is currently in use by me, and displays a list of possible hotkeys I want to use.

Example: I'm writing a document in Word, and the utility program shows a list of hotkeys I could use in Word.

With such a program I could learn the shortcut keys much faster.

Does such a utility exist?