VMwareはVMware社の製品
VirtualboxはOracle社の製品
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@mimorinka and QEMU is a free Linux alternative. I would recommend trying it if you have a weekend to spare.
@mimorinka https://en.m.wikipedia.org/wiki/QEMU under a Linux OS, you would run QEMU in the command prompt. I find QEMU to be more satisfying to use than clients like VirtualBox.
@lucifargundam hmmmm how is this QEMU thing use for?