Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.
Canva gives you everything you need to easily turn ideas into stunning designs.
Vectr is a free graphics editor. Vectr is collaborative like Google Docs, and runs both in your web browser and on your desktop as a native app. With an intuitive interface, Vectr is easy to learn and use.
Free online design editor. Create images for social media, YouTube previews, Facebook covers.
Adobe Fireworks is a bitmap and vector graphics editor. Rapidly prototype websites and application interfaces with Adobe Fireworks CS4 software. Create and optimize images for the web more quickly and accurately than ever before with an enhanced toolset.Discontinued
As described at http://blogs.adobe.com/fireworks/2013/05/the-future-of-adobe-fireworks.html , development of Fireworks has been stopped, but last version, Adobe Fireworks CS6 (v12), released in 2012, is still available as part of the Adobe Creative Cloud
Genially is the world-leader in interactive visual communication. Use this all-in-one online tool to create stunning presentations, interactive images, infographics, dossiers, quizzes, etc. you can enrich with interactivity and animation effects.
Desygner is an online and mobile design solution, which offers a simpler alternative to expensive and complicated design suites.
Creating visual content should be simple, fun and lightweight. Stencil is designed to help you create beautiful looking images faster than ever before. Even if you've never used an image editing program, you can pick Stencil up and use it in seconds.