Although FUA can control user access to just about anything on your front end the most groovy part is the two default groups "logged in" and "logged out". I looked everywhere and as far as I know this the only extension that can control access based on these two groups. Still you could look around for something free but take it from me the pro version is worth the $$ in time and head banging saved. He supports many menu modules including his own. I had an issue with my exmenus not working with FUA loaded and Carsten had a fix pronto.
Paying for an extension is many times a pig in a poke but I am telling you in this case the pig is worth every dime.