Re: [Trisquel-users] is Virtualbox non-free software?

[jason]

Starting with version 4.2 compiling the BIOS used by VirtualBox requires the  
Open Watcom compiler, which is non-free. Since it cannot be compiled using  
free software, it's not included in Trisquel 7. Trisquel 6 still has the old  
version though. Also, this shows why merely looking at the license of a  
program is not enough.

Something like KVM, QEMU, etc. would be a good choice instead.