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

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<h4 class="sidebar-title">Sponsored by</h4>
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<ul class="sponsors-list">
    <li><a href="https://www.keycdn.com/?utm_source=conversejs" target="_blank" rel="noopener">
            <img style="height: 3em" src="/logo/keycdn.png" alt="KeyCDN">
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            <img style="width: 10em" src="/logo/codefirst.png" alt="Codefirst">
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    <li><a href="https://wikisuite.org/?utm_source=conversejs" target="_blank" rel="noopener">
            <img style="width: 11em" src="/logo/wikisuite.png" alt="WikiSuite">
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</ul>
<span class="centered-text-container patreon-link-container"><a href="https://conversejs.org#sponsors">Become a sponsor</a></span>