Plugin for showing different pages based on login

Is there a plugin that shows different content on a page based on whether a user is logged in or not? I already use one that allows a general, no-access message, but I’d like to be able to easily customize each page when the user is not logged in instead of just saying something all-purpose like “Sorry, you don’t have access.” I also found one that lets people of a given level see all content that those below them can see, but I’d like to show completely different pages for the different groups.

Any suggestions would be greatly appreciated.