Former logo of <a href="https://en.wikipedia.org/wiki/Mastodon_(software)" class="extiw" title="w:Mastodon (software)">Mastodon (software)</a>.
Fairpixels
AGPL
From <a rel="nofollow" class="external text" href="https://github.com/tootsuite/mastodon/blob/master/app/assets/images/logo.svg">source repository</a>