PowerBuilder 12.6 is now available on the SAP Marketplace. While this version was originally announced as PowerBuilder 15, it has been renamed to PB 12.6 but contains exactly the same features as the beta provided earlier this year.
Among these features there is O Data support, dockable windows, and 64-bit native applications in PowerBuilder Classic as well as a number of fixes. Check out the full list of PowerBuilder 12.6 features here.
PowerBuilder 12.6 can be downloaded in the SAP Marketplace Download Center; note that when switching to PB 12.6, you will need to migrate your existing code to this version because it was originally built as a major release.
Read the full official announcement on the SAP SCN PowerBuilder Developer Center.