From :
"VirtualBox is a family of powerful x86 virtualization products for
enterprise as well as home use..."

"May 2, 2008
VirtualBox 1.6 released!
The first major release since being acquired by Sun Microsystems is
now available. Version 1.6 has new Mac and Solaris host platform
support, new high performance virtual devices, improved scalability
and Web Services. Get it now, Get it here..."