Open Source VirtualBox и Closed-source Edition. Последняя, Closed-source Edition редакция имеет дополнительные возможности (Enterprise) присутствующие только в ней: Remote Display Protocol (RDP) сервер, виртуальный USB контроллер, USB over RDP (разделение USB устройств в сети через RDP-сервер, iSCSI initiator обеспечивающий виртуализацию для гостевых систем iSCSI устройств, виртуальный Serial ATA controller.

Unattended Edition - программа которая устанавливается автоматически. При установке Unattended программ нет нужды постоянно жать далее, вбивать серийник или крякать, русифицировать, etc – т.е. запустил инсталлятор и за несколько секунд (у кого за несколько минут J) установилась программа. После установки работа программы не отличается от той, которая была [установлена/ крякнута/ русифицирована/ etc] обычным способом.

VirtualBox 4.3.18 (released 2014-10-10)
This is a maintenance release. The following items were fixed and/or added:
VMM: fixed a potential misbehavior after restoring the A20 state from a saved state
GUI: fixed full-screen mode mini-toolbar related regressions for different platforms and window managers (bug #13369)
GUI: X11: fixed full-screen mode Unity panels quirk caused by mini-toolbar code changes in last release (bug #13365)
GUI: X11: added possibility to use legacy full-screen mode as the new one can cause multi-screen issues under Unity, see the manual for more information (bug #13365)
GUI: Mac OS X: fixed full-screen mode artifact causing black screen when 3D acceleration was enabled on 10.10 Yosemite hosts (bug #13448)
GUI: Mac OS X: fixed regression in user-space swiping from/to VBox in full-screen mode
GUI: Mac OS X: fixed issue with switching to VBox in full-screen mode through Alt+Tab and Mission Control
Storage: fixed data corruption when resizing huge VHD images under certain circumstances (bug #11960)
Storage: fixed a rare hang during startup when the BIOS enumerates the storage devices attached to the SATA controller
Storage: follow the spec with AHCI interrupt acknowledge (bug #13474)
Storage: fixed broken iSCSI authentication (4.3.14 regression, bugs #13386, #13435)
NAT Network: properly parse port forwarding rules to allow UDP rules
USB: fixed a crash on Linux hosts with older Linux kernels (bug #13400) and several other fixes
ACPI: fixed ACPI timer anomalies (bug #12076)
Guest Control: fixed a memory leak (bug #13434)
Main: when removing a VM, do also remove the VBoxStartup.log file which might exist on Windows hosts (bug #13478)
Windows hosts: fixed more startup problems on certain Windows hosts due to conflicts with anti-virus software; better error reporting (4.3.14 regression; bug #13187)
Windows hosts: propagate the process startup information to the child process (4.3.14 regression; bug #13243)
Mac OS X hosts: don't force using the discrete GPU (bug #11111)
Windows Additions: some Windows 10 tweaks
X11 guests: fix a bug handling video driver display properties which prevented GNOME Shell on Fedora 21 from starting
Linux hosts / guests: fixed a few remaining warnings in the kernel log if memory allocation fails (bug #11171)