I regularly provide small group training and I want audience members to be able to know when I use keyboard shortcuts. This way they can see how I made something happen. For example, I might press the Command key and the P key to tell an application to print a document. Since the audience can see my screen but not my hands, it’s very useful to have an application display my keystrokes on screen. KeyCastr lets me do this easily. KeyCastr is a free application, but donations are welcomed via PayPal. The developer of KeyCastr has not released a final version of the application. In other words, it’s still in beta-testing, but it’s been this way for a couple of years. In my use of it, I haven’t encountered any problems.