user415: English Google searches about bitcoind and bitcoin-cli often lead to two sites:

https://en.bitcoin.it
https://bitcoin.org

Any idea which one is the official one, endorsed by the maintainers?

user6927: As far as I know there is no official documentation.
The closest you can get to it is the combination of the GitHub:
https://github.com/bitcoin/bitcoin
With the whitepaper:
https://bitcoincore.org/bitcoin.pdf
Changelog appears with every version on the core site, e.g.:
https://bitcoincore.org/en/releases/0.12.1/
And lastly, while I already linked to GitHub it is probably worth mentioning that open and closed issues are documented there:
https://github.com/bitcoin/bitcoin/issues?utf8=%E2%9C%93&q=
Hope this helps.

415: <p>English Google searches about <code>bitcoind</code> and <code>bitcoin-cli</code> often lead to two sites:</p>

<ul>
<li><a href="https://en.bitcoin.it" rel="nofollow">https://en.bitcoin.it</a></li>
<li><a href="https://bitcoin.org" rel="nofollow">https://bitcoin.org</a></li>
</ul>

<p>Any idea which one is the official one, endorsed by the maintainers?</p>
 6927: <p>As far as I know there is no official documentation.</p>

<p>The closest you can get to it is the combination of the GitHub:
<a href="https://github.com/bitcoin/bitcoin" rel="nofollow">https://github.com/bitcoin/bitcoin</a></p>

<p>With the whitepaper:
<a href="https://bitcoincore.org/bitcoin.pdf" rel="nofollow">https://bitcoincore.org/bitcoin.pdf</a></p>

<p>Changelog appears with every version on the core site, e.g.:
<a href="https://bitcoincore.org/en/releases/0.12.1/" rel="nofollow">https://bitcoincore.org/en/releases/0.12.1/</a></p>

<p>And lastly, while I already linked to GitHub it is probably worth mentioning that open and closed issues are documented there:
<a href="https://github.com/bitcoin/bitcoin/issues?utf8=%E2%9C%93&amp;q=" rel="nofollow">https://github.com/bitcoin/bitcoin/issues?utf8=%E2%9C%93&amp;q=</a></p>

<p>Hope this helps.</p>
