Parse cisco asa config

Has anybody come across a utility or devised a procedure to identify redundant objects etc within asa config (cisco asa 5520) or any firewall. I am currently searching via notepad ++ for objects to identify if they are being used.

I want it identify duplicate / overlapping access lists, service groups, network object groups, redundant IP names etc.

What I am trying to achieve is a nice neat and tight firewall config.

Any help would be much appreciated.

Regards, David