VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Some of the features of VirtualBox are:
- Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don't have to hack the source to write a new interface for VirtualBox.
- Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
- VMM: fixed VERR_MAP_FAILED during savestate under certain circumstances (bug #7929)
- GUI: stop updating the VM status icons when the VM is paused (bug #8368)
- VBoxManage: fixed wrong return code after startvm (bug #9642)
- BIOS: fixed hang at launch of DOS applications generated by Clipper 5.3 (note that hardware virtualization may be required)
- USB: fixed OS/2 boot hang when using recent USB drivers
- NAT: increase maximum number of parallel connections making connections with port forwarding more robust (#8471)
- Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
- Main: don't crash if a medium is ejected twice (bug #9922)
- VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
- VRDP: fixed screen freeze (bug #9620)
- OVF/OVA: fixed broken disk images on import under rare circumstances
- OVF/OVA: better error message when importing corrupted appliances
- VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
- 3D Support: Fixed fullscreen mode issues for ATI graphics (bug #9775), Windows Media Player rendering for XPDM-based Direct3D support (bug #8341). Multiple fixes to XPDM and WDDM - based 3D support for Windows Guests and for 3D support in general
- Linux hosts: fixes for Fedoras Linux 2.6.41 (bug #9948)
- Linux hosts/guests: fixes for Linux 3.2 (bug #9743)
- Solaris Additions: various shared folder fixes (bugs #9856, #9862, #9917)
- Windows Additions: various fixes for Direct3D support (un)installation, added detection of missing or wrong Direct3D system files