Download ready-to-use OVA files containing your favorite OS, such as Debian, Ubuntu, Mint, FreeBSD, OpenBSD, etc. Simply "Import" the OVA into VirtualBox and go. (Control+I when in VirtualBox)
Most distributions come in their 32 bit and 64 bit flavors, as well as "Minimal" and "GUI" versions. Where possible, guest additions have been installed to optimize the experience.
Overall this is to aid in quick deployment, testing of environments, application development, or simply getting a personal virtual machine up and running as quickly as possible, with no fuss. Provided in OVA format, simply "File" -> "Import" in VirtualBox.
VM Default Credentials:
Root Password: toor User Password: nimda
The "user" name will be the distribution you're running. For example if it's FreeBSD, the user's name is "freebsd".