...that actually work and don't refuse on grounds of over-commitment....
So far I have found:
phind.com writes code or points out suitable utilities.
koala.sh writes code that works.
you.com chat writes code but it needed tweeking.
jasper.ai which writes prose not code.
(my code task was: "how do I verify utf-8 lines in a file", or "write a python program to verify utf-8 lines in a file".) Only phind.com pointed out that isutf8, file, and iconv utilities could be used.
What other free websites are there (for coding), and what is your opinion of them?