The Wikimedia Commons logo, STL version.
STL version by <a href="//commons.wikimedia.org/wiki/User:Nevit" title="User:Nevit">Nevit Dilmen</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Nevit" title="User talk:Nevit"><span class="signature-talk">talk</span></a>) SVG version was created by <a href="//commons.wikimedia.org/w/index.php?title=User:Grunt&amp;action=edit&amp;redlink=1" class="new" title="User:Grunt (page does not exist)">User:Grunt</a> and cleaned up by <a href="//commons.wikimedia.org/wiki/User:3247" class="mw-redirect" title="User:3247">3247</a>, based on the earlier PNG version, created by <a href="https://meta.wikimedia.org/wiki/User:Reidab" class="extiw" title="m:User:Reidab">Reidab</a>.
This version created by Pumbaa, using a proper partial circle and SVG geometry features. (Former versions used to be slightly warped.)