Ewen Wannop has released an upgrade to his original ByteBagger hex editor program. It is now called ChewBagger and it is a stand-alone file viewer, editor and disassembler.
ChewBagger lets you view the raw data of either the data or resource fork of a file, search for target strings within that fork, using either Hex or ASCII data, and optionally allows you to edit the data, and write the changed data back to the file. You can also load an OMF file into memory, or examine a section of memory.
In addition, you can disassemble, print, or dump to file, a selection or range of data from the viewing screens.