A portable x86 PC emulation software package with gdbstub(1)
A portable x86 PC emulation software package, including GUI debugger(1)
An open-source IA-32 (x86) PC emulator(1)
Bochs Project x86 PC Emulator(2)
Bochs is a powerful x86/amd64 hardware emulation and debugger software.
Besides the CPU and instruct set extensions, it simulates common PC/AT
hardware, an ISA and PCI system bus, memory, disks, video hardware,
ethernet, and enough of a compatible BIOS to run DOS/Winows, Linux/BSD,
Minix and other operating systems.
It doesn't provide virtualization, thus runs extremely slow, but is safe
to run for the host operating system.(1)
IA-32 (x86) PC emulator that runs DOS, Win 95, and more(1)
IA32 and AMD64 PC emulator(1)
LGPL-ed pc emulator(1)
Open source IA-32 (x86) PC emulator written in C++(1)