Keyboard shortcuts popup

[Tony Osime]

I am looking for an application that runs in the background, then on command, pops up a set of keyboard shortcuts for the application I am using.

This will act as a reminder for me, so I do not have to search help or look for keyboard shortcuts any where else.

The App could also allow me to create short cuts to override the ones in the underlying application. I should be able to enter new shortcut reminders by hand.

Going further, the app could also act as a tutorial helping me to learn the keyboard shortcuts by giving me periodic tests - like a typing tutor.

Does such an application exist?