Query the registry!

To view the different options installed in the database, you should use DBA_REGISTRY, as follows:

set lines 200 pages 100
col comp_name format a40
SELECT COMP_NAME,COMP_ID,VERSION,STATUS FROM DBA_REGISTRY;

Example output:

SQL> SELECT COMP_NAME,COMP_ID,VERSION,STATUS FROM DBA_REGISTRY;

COMP_NAME                                COMP_ID                        VERSION                        STATUS
---------------------------------------- ------------------------------ ------------------------------ --------------------------------------------
Oracle Text                              CONTEXT                        11.2.0.4.0                     VALID
Oracle Application Express               APEX                           3.2.1.00.12                    VALID
Oracle Multimedia                        ORDIM                          11.2.0.4.0                     VALID
Oracle XML Database                      XDB                            11.2.0.4.0                     VALID
Oracle Expression Filter                 EXF                            11.2.0.4.0                     VALID
Oracle Rules Manager                     RUL                            11.2.0.4.0                     VALID
Oracle Workspace Manager                 OWM                            11.2.0.4.0                     VALID
Oracle Database Catalog Views            CATALOG                        11.2.0.4.0                     VALID
Oracle Database Packages and Types       CATPROC                        11.2.0.4.0                     VALID
JServer JAVA Virtual Machine             JAVAVM                         11.2.0.4.0                     VALID
Oracle XDK                               XML                            11.2.0.4.0                     VALID
Oracle Database Java Packages            CATJAVA                        11.2.0.4.0                     VALID

12 rows selected.