VirtualBox 4.0.10 is now here with the usual bag of fixes and enhancements, starting with a GUI tweak, which fixes disappearing settings widgets on KDE hosts, then moving onto Storage. It can hold various guest operating systems ranging from Windows, and Linux to Solaris and Open BSD. VirtualBox is a good alternative to pricey virtualization solutions like VMware Fusion and Parallels.
The free, open source virtualization solution from Oracle, VirtualBox has added support for Apple’s upcoming major revision of the Mac OS, Lion.