OSX equivalent of OS9 Key Finder?

[jdc]

i think he means this:

Use Keyboard Viewer to see the layout of characters on your keyboard for your chosen language. For example, if U.S. is selected in the Input menu, you see the characters that appear on a U.S. keyboard in Keyboard Viewer.

To access Keyboard Viewer:
Choose Apple menu > System Preferences and click International.
Click Input Menu, then select the checkbox next to Keyboard Viewer.
Select the On checkbox next to the language whose keyboard layout you want to use.
Choose Show Keyboard Viewer from the Input menu on the right side of the menu bar (the one that looks like a flag).
You can use Keyboard Viewer to see and type characters used in alternate languages other than your chosen language.