PCEmu is a software-only PC emulator that emulates an XT- class machine with text-only VGA. It supports hard and floppy drive images, and allows mounting of Unix directory trees as drives. An EMS interface allows access to arbitrary amounts of memory. It also has a DEBUG-style hardware debugger.
plus4emu is a portable emulator of the Commodore Plus/4 computer. It supports Windows and POSIX platforms (32 bit Windows, 32 and 64 bit Linux, and Mac OS X have been tested). It implements accurate, high quality hardware emulation, but the system requirements are higher than that of most other emulators.