[zwischenzug]

I use hexer for this, which is an editor too.

http://blog.metaclassofnil.com/?p=757

There's also a vim mode for hex, which I use less often:

https://vi.stackexchange.com/questions/2232/how-can-i-use-vi...

[Ksi8bb]

One of the problems with vim+xxd (and many other hex editors) is that it loads the entire file, so you can't easily use it to look at large files (archives, disk images, etc).

Many moons ago I wrote a very bare bones ncurses hex viewer/editor, after not really being able to find one that fit my needs. I still use it pretty regularly: https://github.com/quo/hex.py

[globuous]

There's hexl-mode for emacs that's pretty cool as well:

https://www.gnu.org/software/emacs/manual/html_node/emacs/Ed...