The VirtualBox binaries are available free of charge for personal and evaluation use. By downloading from the below links, you agree to the terms and conditions set forth by the VirtualBox Personal Use and Evaluation License (PUEL) [3].
Links:
[1] http://linux.philosweb.com/drupal/category/it/hardware
[2] http://linux.philosweb.com/drupal/category/it/software/os
[3] http://www.virtualbox.org/wiki/VirtualBox_PUEL
[4] http://www.virtualbox.org/download/1.4.0/VirtualBox_1.4.0_Win_x86.msi
[5] http://www.virtualbox.org/download/testcase/VirtualBox_Beta1.dmg
[6] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Ubuntu_feisty_i386.deb
[7] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Ubuntu_feisty_amd64.deb
[8] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Ubuntu_edgy_i386.deb
[9] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Ubuntu_dapper_i386.deb
[10] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Debian_etch_i386.deb
[11] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Debian_etch_amd64.deb
[12] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_Debian_sarge_i386.deb
[13] http://forum.univention.de/viewtopic.php?p=726
[14] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_openSUSE102-1.i586.rpm.run
[15] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_openSUSE102-1.x86_64.rpm.run
[16] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_fedora7-1.i586.rpm.run
[17] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_fedora7-1.x86_64.rpm.run
[18] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_mdv2007.1-1.i586.rpm.run
[19] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_rhel5-1.i586.rpm.run
[20] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_rhel5-1.x86_64.rpm.run
[21] http://www.virtualbox.org/download/1.4.0/VirtualBox-1.4.0_21864_rhel4-1.i586.rpm.run
[22] http://www.virtualbox.org/download/1.4.0/virtualbox_1.4.0-21864_xandros4.1_i386.deb
[23] http://www.virtualbox.org/download/1.4.0/VirtualBox_1.4.0_Linux_x86.run
[24] http://www.virtualbox.org/download/1.4.0/VirtualBox_1.4.0_Linux_amd64.run