Icon used in <a href="https://www.mediawiki.org/wiki/Extension:Echo" class="extiw" title="mw:Extension:Echo">mw:Extension:Echo</a>
<a href="https://www.mediawiki.org/wiki/Design" class="extiw" title="mw:Design">WMF User Experience Design group</a>
<a rel="nofollow" class="external free" href="https://github.com/wikimedia/mediawiki-extensions-Echo/">https://github.com/wikimedia/mediawiki-extensions-Echo/</a>