Marks tool is a GUI tool and has the following features quoted to me in an email:
- Automated password list updating
- Default user/password checking
- TNS Listener Security settings retrieval
- Noddy password checking e.g. test/test
- Logging
This looks like a useful tool and it is available from http://www.woany.co.uk/Default.aspx?tabid=48 - (broken link) Marks website. I have also updated my Oracle Security Tools page to include this tool in the free tools section.