Advantages of QEMU
This page summarizes some advantages of QEMU compared to other (commercial) similar tools. Most of this is taken from a discussion on QEMU developer mailing list. QEMU ...
has two operation modes
Full System Emulation can run kernel and other OS by itself
is OSS so is not affected by a company going bankrupt
is freely distributable
you can put it on a live CD
you can put it in a distro
can be used without the need to install anything
does not need admin/root privileges
has USB tablet emulation so there is no need to install e.g. vmware tools in client
can record audio (and with patch even MPEGs)
runs on several different host architectures
simulates several different processor architectures as guest
simulates various different HW peripherals
can be used for (Linux-) SW development
you can use it for kernel development, connect with GDB to kernel and don't need to reboot real machine
you can use it for embedded and cross development, using either user mode emulation (see e.g. http://www.scratchbox.org/scratchbox) or full system emulation (see e.g. ARM Linux on QEMU)
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