Try out these VirtualBox images available at
http://virtualboximages.com/ [6]
Links:
[1] http://pulse.veltsos.com/category/it/software/foss
[2] http://pulse.veltsos.com/category/it/open-source-foss
[3] http://pulse.veltsos.com/category/it/software
[4] http://pulse.veltsos.com/category/it/softwareos
[5] http://pulse.veltsos.com/category/it/virtualization
[6] http://virtualboximages.com/