GNU Emacs logo. See its history at <a rel="nofollow" class="external text" href="http://www.ee.ryerson.ca/~elf/emacs/logo/">The Design of the Emacs logo</a>. This is an SVG version of original bitmap logo created by hand from scratch in Inkscape.
Original Emacs logo creator is Luis Fernandes; SVG version by Dmitry Dzhus.
GPL
Own work based on XPM file from GNU Emacs distribution