If you are a lazy person like me (sometimes) then this post will be useful to download pre installed OS VirtualBox images as VDI files for completely free. Each VirtualBox image saves your installation and configuration time. Its not required to get CD or ISO and install on VirtualBox. Just Download these Free VDI (VB hard disk files) and start using them.
These free VDI file downloads are direct and not torrent. So do not worry about spyware or malware. Obviously, don’t ask me where to download licensed operating system VDI images such as Windows, Mac OS X etc, but still it’s possible to download some licensed versions of OSs on internet. You search and find. This list is mostly included free and open license OSs.
VirtualBox Image VHD Download
If you are interested to run Windows 2008 R2, Windows 7 and some of Microsoft products on VirtualBox without installation, it’s possible by VHD image files. Download official VHD (Microsoft Virtual Hard Disk) files from below links.
And some more VHD files are here.
VirtualBox Image VDI Download
One more site is available for latest VDI files download but with very minimum payment. They categorized VDI downloads as below.