Looka - Make a logo you’ll love with Looka Logo Maker.
Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
Logo Dust - Free logo designs for your projects, added every week
PixaPal - Create videos, graphics and documents online
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.
GIMP Online - Powerful graphics editor in the cloud