Link to Pre-Built VMs from Ahmed Baraka website

https://ahmedbaraka.com/public/index.php/download

Pre-Built Developer VMs (for Oracle VM VirtualBox)

https://www.oracle.com/downloads/developer-vm/community-downloads.html

Oracle VM Virtual Appliances

https://www.oracle.com/virtualization/technologies/virtual-appliances.html

https://www.oracle.com/database/technologies/rac/vm-db-templates.html

Pre-Built Linux VMBox and VMWARE  Images