Fish shell 2.1

Also, most of the features described are in Bash.

I think every one of the command completion features except the one where you don't have to type tab has been in Bash since about 2005. Bash' command completion facility is fully programmable, so some of the more esoteric things, such as completing a username for 'su', require downloading additional software.

The commmand completion in Bash is really from the Readline library. I often write programs with command shells, and I always use Readline and get all that command completion stuff. I have to write code for the completions that make sense in the particular environment (e.g. the set of command verbs the program recognizes), but it's nice having TAB do what my fingers expect no matter what kind of prompt I'm facing.

Except for the friendly variable name, I thought the status codes for process terminations were standard Bourne shell. They do seem to be identical to Bash. What would be nice is if the information weren't delivered in code at all - have a variable for whose value is "terminated by signal" if the process was terminated by a signal, and another called $signal_number that tells you what class of signal it was.

As far as I know, nothing like the coloring described exists in Bash.