Developer Suite or Fusion Middleware for Forms builder / Report builder

Hi
I'd like to develop forms modules using Forms builder and Report builder.
Then I tried to find the download files to install forms builder and report builder.

Now I know that both Developer Suite and Fusion Middleware have Forms builder and Report builder components.
Which software(Developer Suite or Fusion Middleware) should I use?

For information, I'm using the following s/w as a server.
  - Weblogic Server 10.3.6
  - Oracle Fusion Middleware 11.1.1.6
   （Oracle Portal, Forms, Reports and Discoverer 11g)


Thanks in advance,
Akiko