ArcEm is a register level emulator of the Acorn Archimedes A4x0 system based around the ARM microprocessor. It is distributed with ARM Linux binaries and will boot ARM Linux and Acorn's RISC OS 3.1. It runs under X, Win32, and RISC OS. It is based on the release of the ARM emulator core by ARM Ltd, although this has been heavily modified for the emulation. It is a reasonably accurate register level emulation and as such should run pretty much anything.
cxmon is an interactive command-driven file manipulation tool inspired by the "Amiga Monitor" by Timo Rossi. It has commands and features similar to a machine code monitor/debugger, but it lacks any functions for running/tracing code. There are, however, built-in PowerPC, 680x0, 80x86, 6502 and Z80 disassemblers and special support for disassembling MacOS code. cxmon is primarily intended for emulation development but it can be used as a generic tool for manipulating and analyzing binary data and machine code, or just as a hex calculator.