Oracle Assessment Toolkit
The kit includes a tool to get oracle versions (this can be seen in the OHH as well for explanations), a tool to enumerate users in a database without authenticating. A password brute force tool, a tool to retrieve the SID's from the listener, a tool to guess SID's and an example of the Jan 2006 CPU DB18 AUTH_ALTER_SESSION hack.
Worth downloading and also keeping an eye on for fixes and updates.