VMware allows you to run 'virtual machines' inside a Linux host. It is not an emulator. It provides a virtual computer within the host which can boot whichever OS you decide to put on the filesystem image that is used as a harddrive. It will run DOS 6.22, Win 3.1, Win9x, WinNT/2000/XP/2003, Linux, Novell, and more. The only main requirement is a 400 MHz or better machine, along with lots of RAM (128M minimum, 256M recommended).
License: Free To Use But Restricted
Changes:
Several security vulnerabilities, reported as
CORE-2007-0930, Foundstone CODE-BUG-H-001, and
CODE-BUG-H-002, were fixed. Libpng was updated to
remove various security vulnerabilities. OpenSSL
was updated to solve a security vulnerability
reported as CVE-2006-4339. Several other bugs were
fixed.