Since I have been using VirtualBox for virtualization on Ubuntu, I decided to look for premade images, built for VirtualBox. Every major virtualization platform has an image index, such as VMware’s Virtual Appliance repositories, or QEMU’s FreeOsZoo. I found that VirtualBox has one of it’s own, too.
It’s called VDI Index | veeDee-Eyes; V(vee)D(Dee)I(eyes)… get it? Took me a day to figure that one out. You can visit the site here.
Currently, there are 22 disk images available, up 2 from just two days ago, so this site is growing rather quickly. Since Linux is free, the images are available for, well, free. If you run VirtualBox, I definitely recommend you check out the VDI Index.