I share over here some virtual machines (VMs) or VirtualBox appliances that I created myself when I was testing Oracle products. When you use any of the downloadable files, make sure that the Oracle VirtualBox version of your environment is compatible with the downloaded file. The details of each file are provided in the readme file. Obtain the readme file from this download page. It is not included in the downloadable file.
I have included torrent files for downloading the VMs via Torrent clients. Click on the last Download button for the required VM.
If you have a problem downloading a VM, please let me know.