I have just updated my tools page
to move the helix recovery CD from the commercial section to the free section where it should be and also to add two new commercial Oracle security auditing products. These are DB Audit 2.0 from SoftTree and Ambeo. I found these products from a thread on the Oracle-L mailing list entitled "Recommend good Oracle Auditing software?
" where the poster was looking for an auditing solution that was central repository based and also had a GUI interface and canned reports. barbara recommended Ambeo here
and John recommended DB Audit 2.0 here