VMware image of FreeBSD 7.1 RC1 with lots of goodies installed (i.e. Firefox, Thunderbird, OpenOffice 3, VLC, Pidgin, Skype, Xchat, Gimp, etc.) and an attractively themed XFCE4 desktop to make it as close as possible to OSX.
User account: freebsd
Root password: root4u
WARNING: This is a VMware image. In other words, it's NOT a live CD and can't be used for a standard installation -- you've been warned! ;-)