Oracle Designer 10g Release 2 is the latest stable release which is shipped with Oracle Developer Suite 10g Release 2.
Oracle Designer 10gwas the last version of this product, released as a component of Oracle
Developer Suite 10g. Oracle Designer was not released as a component of Oracle Fusion
Middleware 11g, nor is it planned to be a component of Oracle Fusion Middleware 12c. Oracle
Support continues to offer sustaining level support for Oracle Designer 10g.
For SCM see here:
Oracle SCM has been placed into maintenance mode. This means that Oracle will
continue to fix bugs but there will be no new features added to the product. Error
Correction Support for Oracle SCM 6i ended on 01/31/2005, for Oracle9i SCM
on 06/30/2005 and for Oracle SCM 10g(9.0.4) on 12/31/2006 - in line with the
corresponding Oracle Designer 6i, 9i and 10g end of maintenance plans. Oracle
Designer 10g(10.1.2.2) is the currently supported product.
So in short: no Designer and SCM for 11g.