Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Looka - Make a logo you’ll love with Looka Logo Maker.
Sketch - Professional digital design for Mac.
Logo Dust - Free logo designs for your projects, added every week
Affinity Designer - Professional creative software, exclusively for Mac.
Canva Logo Maker - Create your own custom logos without having to hire a designer with Canva's impressively easy to use logo maker. Completely free, completely online.