Many Oracle data warehouses have been built with Oracle Warehouse Builder (OWB). Unfortunately, that product has been discontinued, i.e. the 11gR2 version is the last there will ever be.
Support-wise, it follows the 11gR2 database, which ran out of premier support 31 january 2015. However, Oracle has waived the extra fee for extended support for one year, which means that your regular support runs until 31 january 2016. If you want support for OWB after that, you will have to pay the extended support fee.
So what are your alternatives?
For more information, refer to the Oracle Data Integrator and Oracle Warehouse Builder Statement of Direction