cxmon

Interactive file manipulation tool and disassembler

Cxmon is an interactive command-driven file manipulation tool that is inspired by the "Amiga Monitor". Cxmon has commands and features similar to a machine code monitor/debugger, built-in PowerPC, 680x0, 80x86, 6502 and Z80 disassemblers and special support for disassembling MacOS code. You can also simply use it as an interactive workbench for manipulating files, or even as a hex calculator.