With Oracle Database 9i and 10g now both out of support, you should be thinking about an Oracle Database Upgrade to Oracle 11g or 12c?
With each release there is is always improvements and new features.
Here are some key features of Oracle Database 9i, 10g and 11g;
Oracle Database Comparison
dsp have extensive experience across all Oracle database versions, Oracle Database upgrades and Oracle Database consultancy.
An extensive list of features and enhancements can be downloaded here.
Oracle Database 12c - what is new?
There are a host of new features that are now available with Oracle database 12c, including multitenant architecture which enables you to run pluggable databases in a multitenant container database. There are also many improvements in areas such as Big Data, Data security and Storage optimisation, which are key areas which will help drive future business growth.
More information on Oracle12c can be downloaded here.