Are console applications useful?

I was wondering if "pure" console applications (no platform - dependent libraries that are not in the C standard) are actually useful. If they are useful, could anybody please recommend me a couple of difficult & complex "pure" console projects?
Where should we start?
grep, sed, awk, ssh, bash, gromacs, python, GCC, ...

(I'm not sure what libraries they link, but AFAIK they are console.)
Useful for whom ?

The one's keskiverto mentioned are useful for programmers and power users, but not for ordinary users. Normal users probably find GUIs like an Office suite, browser, photo editing software, email program... much more useful
Indeed. These babies are for "useful things", yet no "normal" user will ever see them ...
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