If you want to use the Oracle BI Suite or your own components without putting the Oracle Application Server (AS) into operation - well you can! Simply install the BI-Subset of the AS (called OC4J) which can run on you Database Server that will provide the middle tier for Oracle BI components. The OC4J is supplied within the Business Intelligence package of version 10g R2. Take a look at it this. It's currently available for Windows, Linux and Sun Solaris.
This is a list of the contents:
