converse.js/docs/source/_templates/sponsors.html

<span class="centered-text-container">
<h3 class="sidebar-title">Sponsored by</h3>
</span>
<ul class="sponsors-list">
    <li><a href="https://www.keycdn.com/?utm_source=conversejs" target="_blank" rel="noopener">
            <img style="height: 2em" src="/logo/keycdn.png" alt="KeyCDN">
        </a>
    </li>
    <li><a href="https://wikisuite.org/?utm_source=conversejs" target="_blank" rel="noopener">
            <img style="height: 3em" src="/logo/wikisuite.png" alt="WikiSuite">
        </a>
    </li>
</ul>
<span class="centered-text-container patreon-link-container">
<a href="https://conversejs.org#sponsors">Become a sponsor</a>
</span>