APs IHexEdit is a simple editor for Intel .hex files. The files are displayed as continuous blocks in 8, 16, 24, or 32 bit words, with corresponding addresses. Each of which you can view, edit as hex and ASCII, and print.
I couldn't open any files with this product (even files with the extension hex), and I got absolutely no error message saying why the files I selected couldn't be opened or displayed. It just silently failed.